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Las respuestas fotodinámicas inducidas por la quiralidad de las metalohélices dinucleares de doble hebra ópticamente
Xuezhao Li1, Zhicheng Wang2, Xiaorou Hao1
1School of Chemistry, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China.
Journal of the American Chemical Society
|June 27, 2023
Resumen
Las metalóhelicas de quiral iridio (III) muestran potentes respuestas de terapia fotodinámica dependientes de los enantiómeros (PDT). El enantiómero Δ2S4-H exhibe una eficacia excepcionalmente alta de PDT al migrar al núcleo e inhibir las proteínas nucleares clave.
Área de la Ciencia:
- Química de coordinación
- Terapia fotodinámica
- Las drogas metálicas
Sus antecedentes:
- Los enantiómeros de fármacos quirales interactúan de manera diferente con las biomoléculas, afectando el comportamiento biológico.
- Comprender estas interacciones es crucial para el diseño y desarrollo de fármacos.
Objetivo del estudio:
- Diseñar y sintetizar el iridio (III) metálico de pureza óptica, catiónico y de dos núcleos.
- Para investigar sus respuestas a la terapia fotodinámica dependiente de enantiómeros (PDT).
- Aclarar los mecanismos subyacentes a sus diferentes actividades biológicas.
Principales métodos:
- Síntesis de las metalohelices quirales de Iridio (III) (Λ2R4-H y Δ2S4-H).
- Estudios in vitro e in vivo de las respuestas a la terapia fotodinámica (TPD).
- Análisis proteómico y simulaciones de acoplamiento molecular.
Principales resultados:
- Las metalóhelicas de pureza óptica mostraron una toxicidad oscura insignificante, pero una toxicidad inducida por la luz significativa.
- Δ2S4-H exhibió un índice de fotocitotoxicidad (PI) notablemente alto de 63.966, en comparación con 428 para Λ2R4-H.
- Δ2S4-H migró de las mitocondrias al núcleo después de la irradiación, inhibiendo las proteínas nucleares y desencadenando el estrés oxidativo.
Conclusiones:
- La quiralidad de las metalóhelicas de iridio influye significativamente en la eficacia de la TDP.
- Δ2S4-H representa un agente de PDT muy eficaz con un mecanismo de acción único.
- Este estudio proporciona información para el diseño de nuevos metalodrogas quirales helicoidales con mayor potencial terapéutico.
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