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La administración de fármacos con un complejo de calixpirrol-trans-Pt (II)
Grazia Cafeo1, Grazia Carbotti, Angela Cuzzola
1Dipartimento di Scienze Chimiche, Università di Messina, viale F. Stagno D'Alcontres 31, 98166 Messina, Italy.
Journal of the American Chemical Society
|January 29, 2013
Resumen
Un nuevo complejo de platino (II) con un derivado de pirrol calix[4] muestra una prometedora actividad anticancerígena. La unidad calix[4]pyrrole ayuda a administrar el medicamento de platino a las células cancerosas, mejorando sus efectos citotóxicos.
Área de la Ciencia:
- Coordinación Química de la Coordinación
- Química supramolecular de las moléculas.
- Química Medicinal La Química Medicinal es un campo de estudio de la química medicinal.
Sus antecedentes:
- Los complejos de platino (II) son ampliamente utilizados como fármacos contra el cáncer.
- Los derivados de pirrol calix[4] son conocidos por sus propiedades de unión de aniones.
- El desarrollo de sistemas de administración de fármacos dirigidos es crucial para mejorar la terapia del cáncer.
Objetivo del estudio:
- Para sintetizar y caracterizar un nuevo trans-calix[4]pyrrole-Pt(II) complejo.
- Investigar el potencial de la unidad calix[4]pyrrole para la entrega asistida del centro Pt(II) al ADN a través de la unión de fosfato.
- Evaluar la actividad citotóxica in vitro del complejo sintetizado contra varias líneas celulares de cáncer.
Principales métodos:
- Síntesis de un derivado de pirrol meso-p-nitroanilina-calix[4] coordinado con un centro Pt(II).
- Cristalografía de rayos X para la determinación de la estructura.
- Espectroscopia de Resonancia Magnética Nuclear (RMN) para estudiar la cinética de la complejación del monofosfato de adenosina (AMP).
- En ensayos de citotoxicidad in vitro en diferentes líneas celulares de cáncer.
Principales resultados:
- La estructura del complejo trans-calixpirrol-Pt (II) fue determinada con éxito mediante análisis de rayos X.
- Los estudios de RMN en acetonitrilo seco sugirieron una posible unión de aniones de fosfato por la unidad de calix[4]pirrol, lo que facilita la entrega de metal.
- La interacción del calix[4]pirrol con el fosfato no se detectó en presencia de agua.
- El complejo trans-calixpyrrole-Pt(II) exhibió una actividad citotóxica significativa in vitro contra las líneas celulares de cáncer, atribuida a la acción combinada de las fracciones Pt(II) y calix[4]pyrrole.
Conclusiones:
- Un nuevo complejo trans-calixpyrrole-Pt(II) posee una actividad citotóxica significativa contra las células cancerosas.
- La unidad calix[4]pirrole probablemente contribuye a la eficacia general del complejo de platino.
- Se requiere más investigación para dilucidar el mecanismo de acción preciso y optimizar el potencial de administración del fármaco en ambientes acuosos.
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