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Explotación de proteínas oncogénicas intracelulares para la liberación de citotoxinas

Matthias Schild¹, Dennis Gillingham¹

¹Department of Chemistry, University of Basel 4056 Basel Switzerland dennis.gillingham@unibas.ch.

RSC medicinal chemistry

|January 19, 2026

Resumen

Los inhibidores de moléculas pequeñas se reposicionan para la administración intracelular dirigida de fármacos. Esta estrategia utiliza conjugados de inhibidor-tetrazina para activar profármacos enjaulados con TCO, lo que permite la liberación controlada de cargas citotóxicas para la terapia del cáncer.

Área de la Ciencia:

Oncología
Química Medicinal
Biología Molecular

Sus antecedentes:

Los conjugados anticuerpo-fármaco resaltan la entrega citotóxica dirigida, pero muchos impulsores oncogénicos son intracelulares e inaccesibles para los anticuerpos.
Los inhibidores de moléculas pequeñas se utilizan actualmente para dianas intracelulares pero carecen de mecanismos de entrega dirigidos.
El desarrollo de estrategias novedosas para la entrega intracelular dirigida de cargas citotóxicas es crucial para avanzar en la terapia del cáncer.

Objetivo del estudio:

Explorar el reposicionamiento de inhibidores de moléculas pequeñas para la entrega intracelular y la liberación controlada de cargas citotóxicas.
Desarrollar una estrategia de pre-direccionamiento utilizando química de clic para liberación para la activación selectiva de profármacos enjaulados.
Demostrar la viabilidad de este enfoque utilizando una terapia dirigida al receptor del factor de crecimiento epidérmico (EGFR).

Principales métodos:

Se utilizó química de clic para liberación para crear conjugados de inhibidor-tetrazina para activación dirigida.
Se desarrollaron profármacos enjaulados con trans-ciclooteno (TCO) administrados sistémicamente para la liberación controlada de la carga útil.
Se empleó un conjugado de afatinib-tetrazina para dirigirse a células con sobreexpresión de EGFR y administrar una carga útil de monometil auristatina E (MMAE).

Principales resultados:

Se logró una retención intracelular suficiente del conjugado de afatinib-tetrazina en células con sobreexpresión de EGFR.
Se demostró la recuperación exitosa de la toxicidad de un derivado de MMAE protegido con TCO tras la activación intracelular.
Se validó el concepto de entrega intracelular dirigida y liberación controlada de cargas citotóxicas.

Conclusiones:

El reposicionamiento de inhibidores de moléculas pequeñas con química de clic para liberación permite la entrega intracelular dirigida de cargas citotóxicas.
Esta estrategia permite la liberación controlada de la carga útil, superando las limitaciones de los conjugados anticuerpo-fármaco tradicionales para dianas intracelulares.
Establece una base para expandir la entrega dirigida de fármacos a impulsores oncogénicos previamente inaccesibles, mejorando la eficacia del tratamiento del cáncer.

Palabras clave:

terapia del cáncer entrega de fármacos citotoxinas química de clic para liberación inhibidores de moléculas pequeñas EGFR proteínas oncogénicas conjugados de inhibidor-tetrazina profármacos enjaulados con TCO liberación controlada

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