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Degradación selectiva de proteínas de interés a través del enfoque de Quimera dirigido a la proteólisis por división
Chunli Song1, Zijun Jiao2,3, Zhanfeng Hou1
1State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
Journal of the American Chemical Society
|September 14, 2023
Resumen
Este estudio introduce un sistema de división y mezcla de proteólisis dirigida a quimera (PROTAC) basado en liposomas. Este nuevo LipoSM- PROTAC demuestra una mayor eficacia en la orientación tumoral y la degradación de proteínas a concentraciones más bajas.
Área de la Ciencia:
- Biotecnología
- Biología molecular
- Sistemas de administración de fármacos
Sus antecedentes:
- La tecnología Proteolysis Targeting Chimera (PROTAC) utiliza el sistema ubiquitina-proteasoma para la degradación dirigida de proteínas.
- Los anteriores PROTAC divididos y mezclados basados en péptidos (SM-PROTAC) fueron prometedores pero limitados por la menor eficacia del fármaco.
- La administración dirigida y la eficacia mejorada son cruciales para el avance de la tecnología PROTAC en aplicaciones biomédicas.
Objetivo del estudio:
- Desarrollar un nuevo sistema de separación y mezcla de liposomas basado en el autoensamblaje PROTAC (LipoSM-PROTAC).
- Para mejorar las capacidades de orientación de tumores mediante la modificación de ácido fólico (FA).
- Validar la eficacia de LipoSM- PROTAC para la degradación de los receptores de estrógeno alfa (ERα).
Principales métodos:
- Construcción de una nanoplataforma de autoensamblaje de liposomas para el suministro de PROTAC dividido y mezclado.
- Modificación de la nanoplataforma con folato (FA) para mejorar la orientación de las células tumorales.
- Validación in vitro de la degradación de ERα en las células positivas para los receptores de folato (FR+).
Principales resultados:
- El sistema LipoSM-PROTAC mostró una absorción eficiente y selectiva en las células FR+.
- Se logró una degradación significativa de la proteína diana ERα a concentraciones reducidas.
- En comparación con los SM- PROTAC basados en péptidos, LipoSM- PROTAC demostró una eficacia terapéutica superior a dosis más bajas.
Conclusiones:
- El sistema LipoSM-PROTAC desarrollado ofrece una mejor eficacia del fármaco y capacidades de orientación tumoral.
- Esta plataforma basada en liposomas presenta un potencial significativo para la traducción clínica en la tecnología PROTAC.
- La plataforma LipoSM proporciona un enfoque versátil para el desarrollo de PROTAC y otras regulaciones biomoleculares.
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