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Nanopartículas de oro funcionalizadas con anticuerpos para imagenología multimodal
Neelima Chacko1, Menachem Motiei2, Revital Rotbaum2
1Department of Physics, Ariel University, Ariel, Israel.
Scientific reports
|February 13, 2026
Resumen
Los investigadores desarrollaron nanocolorantes de oro (AuND) para mejorar la imagenología de infrarrojo cercano (NIR) y el contraste de tomografía computarizada (CT). Este enfoque multimodal mejora la detección temprana del cáncer en modelos preclínicos.
Área de la Ciencia:
- Imagenología Biomédica
- Nanotecnología
- Oncología
Sus antecedentes:
- La ventana espectral del infrarrojo cercano (NIR-I) (700-900 nm) ofrece penetración profunda en los tejidos para la imagenología in vivo.
- La baja intensidad de fluorescencia de los fluoróforos NIR existentes limita la sensibilidad.
- Las nanoestructuras de oro ofrecen potencial para mejorar las propiedades ópticas y el contraste de rayos X.
Objetivo del estudio:
- Desarrollar un nuevo nanocolorante de oro (AuND) para imagenología multimodal.
- Mejorar la emisión de fluorescencia y proporcionar contraste de tomografía computarizada (TC).
- Evaluar la eficacia de AuND para la imagenología del cáncer preclínico.
Principales métodos:
- Conjugación de nanospheras de oro (AuNSs) con éster NHS de IRDye 800 a través de enlaces de polietilenglicol (PEG).
- Funcionalización de AuNSs con anticuerpos dirigidos al receptor del factor de crecimiento epidérmico (EGFR) (Anti-AuND).
- Integración de TC, fluorescencia NIR e imagenología de tiempo de vida de fluorescencia (FLT) en un modelo de ratón preclínico.
Principales resultados:
- Desarrollado Anti-AuND con emisión de fluorescencia mejorada a través de interacciones plasmónicas.
- Demostrada alta atenuación de rayos X del oro para contraste de TC.
- Lograda visualización tumoral in vivo de alta sensibilidad y alta resolución en un modelo de cáncer de cabeza y cuello con sobreexpresión de EGFR.
Conclusiones:
- Anti-AuND permite una plataforma de imagenología multimodal que integra TC, fluorescencia NIR e imagenología FLT.
- El enfoque combinado proporciona información anatómica y molecular complementaria.
- Anti-AuND muestra potencial para la detección temprana del cáncer y la imagenología biomédica traslacional.
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