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Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides
Published on: November 21, 2013
Péptido autoensamblador como un potencial portador de compuestos hidrofóbicos
Christine Keyes1, Jean Duhamel, Shan-Yu Fung
1Department of Chemistry , University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada.
Journal of the American Chemical Society
|June 17, 2004
Resumen
El oligopéptido autoensamblador EAK16 II estabiliza la carga hidrofóbica en el agua y la entrega a entornos lipofílicos. Las tasas de liberación son ajustables ajustando la relación péptido-carga y el grosor del revestimiento.
Área de la Ciencia:
- Ciencia de los Biomateriales Ciencia de los Biomateriales.
- Química supramolecular de las moléculas.
- Sistemas de suministro de drogas Sistemas de suministro de drogas.
Sus antecedentes:
- Los compuestos hidrofóbicos requieren estabilización para la suspensión acuosa.
- Los péptidos autoensambladores ofrecen un enfoque prometedor para la estabilización de la carga.
- Imitar las membranas biológicas es crucial para comprender la entrega de la carga.
Objetivo del estudio:
- Para investigar la estabilización y liberación de la carga hidrofóbica utilizando EAK16 II.
- Para cuantificar la cinética de liberación de pireno de los recubrimientos EAK16 II en las vesículas lipídicas.
- Para determinar la influencia de la relación péptido-carga y el grosor del revestimiento en las tasas de liberación.
Principales métodos:
- Estabilización de los microcristales de pireno con el oligopéptido EAK16 II.
- Preparación de vesículas de fosfatidilcolina de huevo (EPC) para modelar las membranas celulares.
- Espectroscopia de fluorescencia para monitorear la cinética de liberación de pireno.
- Microscopía electrónica de barrido (SEM) para analizar el grosor del recubrimiento del cristal.
Principales resultados:
- EAK16 II estabilizó eficazmente los cristales hidrofóbicos de pireno en una solución acuosa.
- El pireno se liberó de los recubrimientos EAK16 II y se dispersó molecularmente dentro de las vesículas EPC.
- La velocidad de liberación dependía de la relación péptido-pireno y el grosor del recubrimiento, con mayores proporciones y recubrimientos más gruesos que conducen a una liberación más lenta.
Conclusiones:
- EAK16 II es un sistema viable para estabilizar la carga hidrofóbica en medios acuosos.
- El sistema EAK16 II facilita la entrega de carga en entornos lipofílicos como las bicapas lipídicas.
- La cinética de liberación ajustable se puede lograr mediante el control de la relación péptido-carga y la morfología del recubrimiento.
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