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Efectos de los polisorbatos en las propiedades moleculares y termodinámicas de las estructuras de los
Evgenii Kliuchnikov1, Daniel Pierson2, Ying Chou1
1Department of Chemistry, University of Massachusetts, Lowell, MA 01854, USA.
Molecular therapy. Nucleic acids
|February 20, 2026
Resumen
Los tensioactivos como los polisorbatos estabilizan los oligonucleótidos de morfolino fosforodiamidato (PMOs) al unirse a ellos. Esta interacción evita que el PMO se desarrolle sin alterar su estructura esencial similar al ARN, lo que ayuda en el diseño terapéutico.
Área de la Ciencia:
- La bioquímica es la bioquímica.
- Biología Molecular Biología Molecular
- Entrega de drogas Envío de drogas
Sus antecedentes:
- Los oligonucleótidos de morfolino de fosforodiamidato (PMOs, por sus siglas en inglés) son imitaciones de ARN con potencial terapéutico.
- Los datos estructurales limitados dificultan la comprensión del comportamiento físico-químico de la PMO.
- Elucidar las relaciones estructura-función es crucial para el diseño racional de fármacos.
Objetivo del estudio:
- Investigar la interacción entre los PMO y los tensioactivos comunes (Polisorbato 80 y 20).
- Determinar cómo los tensioactivos afectan la estructura y la estabilidad de la PMO.
- Proporcionar ideas para el diseño de terapias estables basadas en PMO.
Principales métodos:
- Espectroscopia combinada de tensión superficial y dicroísmo circular (CD).
- Empleó simulaciones de dinámica molecular.
- Se analizaron las energías de formación e interacción del complejo PMO-surfactante.
Principales resultados:
- Se observaron fuertes interacciones PMO-surfactante dependientes de la concentración (-50 a -80 kcal/mol).
- Los tensioactivos se unen a las superficies de PMO y pueden insertarse en las estructuras, evitando el despliegue.
- La unión PMO-surfactante preserva el emparejamiento de bases, el apilamiento y la quiralidad, consistente con los datos del CD.
- Los tensioactivos pueden actuar como acompañantes, promoviendo el replegamiento en estructuras compactas.
Conclusiones:
- Los agentes tensioactivos estabilizan los conformadores PMO sin alterar las características estructurales esenciales.
- La comprensión de estas interacciones es clave para el diseño racional de terapias de imitación de ARN.
- Los complejos PMO-surfactante exhiben propiedades únicas de exposición a disolventes.
Palabras clave:
La espectroscopia de CD es una espectroscopia de CD.MT: Oligonucleótidos: terapias y aplicaciones.Interacciones y energías PMO-surfactante.simulaciones de MD de todos los átomos.el modelado molecular computacional.El fosforodiamidato es un oligómero de morfolino.El polisorbato 20 es un compuestoel polissorbato 80 y el polisorbato 80La tensión superficial es la tensión superficial.Los agentes tensoactivos son sustancias superactivas.
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