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Determinación de la biodisponibilidad de la biotina conjugada con las nanopartículas enlazadas en la cáscara (SCK)
Kai Qi1, Qinggao Ma, Edward E Remsen
1Department of Chemistry, Washington University, One Brookings Drive, Saint Louis, Missouri 63130-4899, USA.
Journal of the American Chemical Society
|May 27, 2004
Resumen
Las nanopartículas enlazadas de la cáscara (SCK) con densidad de biotina sintonizable se crearon utilizando un método de micela mixta. La disponibilidad de biotina en la superficie aumentó con un mayor contenido de copolímero de bloque biotinilado, pero se mantuvo por debajo de los niveles teóricos.
Área de la Ciencia:
- Química de Polímeros La Química de Polímeros es la química de los polímeros.
- Nanotecnología La nanotecnología es la nanotecnología.
- La bioconjugación por bioconjugación.
Sus antecedentes:
- Las nanopartículas entrelazadas de Shell (SCK) ofrecen plataformas versátiles para la administración y el diagnóstico de medicamentos.
- La biotinilación es crucial para aplicaciones de entrega dirigida y reconocimiento molecular.
- El control de la densidad de funcionalización superficial es esencial para optimizar el rendimiento de las nanopartículas.
Objetivo del estudio:
- Para sintetizar SCKs con grupos de biotina disponibles en la superficie controlables.
- Para investigar la relación entre el contenido de copolimero de bloque biotinilado y la densidad de biotina en la superficie.
- Caracterizar las propiedades físicas y la accesibilidad a la biotina de los SCK sintetizados.
Principales métodos:
- Metodología de micella mixta para la síntesis de nanopartículas.
- Dispersión dinámica de la luz (DLS), microscopía de fuerza atómica (AFM) y microscopía electrónica de transmisión (TEM) para la caracterización.
- Avidin/HABA ensayo de unión competitivo y espectroscopia de correlación de fluorescencia (FCS) para cuantificar la biotina de superficie.
Principales resultados:
- Se sintetizaron con éxito SCK con diferentes densidades de biotina.
- La disponibilidad de biotina en la superficie aumentó con una mayor incorporación de poli (ácido acrílico) b-poli (acrilato de metilo) biotinado (PAA-b-PMA).
- La densidad de biotina superficial medida fue consistentemente inferior al 25% del máximo teórico.
Conclusiones:
- El enfoque de micela mixta permite la biotinilación de superficie sintonizable de las SCK.
- Se necesita una optimización adicional para lograr mayores densidades superficiales de biotina.
- Estos SCK biotinilados tienen potencial para aplicaciones biomédicas específicas.
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