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Un sistema portador supramolecular huésped-invitado para factores de crecimiento que emplea fragmentos V(H) H

Jordi Cabanas-Danés¹, Emilie Dooms Rodrigues, Ellie Landman

¹Molecular Nanofabrication Group, MESA+ Institute for Nanotechnology, Faculty of Science and Technology, University of Twente , P.O. Box 217, 7500 AE Enschede, Netherlands.

Journal of the American Chemical Society

|August 26, 2014

Resumen

Este estudio presenta una nueva estrategia supramolecular que utiliza anticuerpos etiquetados con His6 para inmovilizar de manera reversible los factores de crecimiento, permitiendo la entrega controlada y demostrando su actividad biológica en la diferenciación celular para aplicaciones de ingeniería tisular.

Área de la Ciencia:

Ciencia de los Biomateriales Ciencia de los Biomateriales.
Química supramolecular de las moléculas.
Ingeniería de proteínas Ingeniería de proteínas.

Sus antecedentes:

El ensamblaje controlado de los factores de crecimiento es crucial para la regeneración tisular.
Los métodos existentes a menudo carecen de reversibilidad y control temporal.
La química supramolecular ofrece interacciones ortogonales para el ensamblaje molecular preciso.

Objetivo del estudio:

Desarrollar una estrategia supramolecular reversible para la inmovilización del factor de crecimiento.
Para utilizar las interacciones ortogonales anfitrión-invitado y metal-afinidad para el ensamblaje.
Para demostrar la actividad biológica de los factores de crecimiento inmovilizados.

Principales métodos:

La expresión recombinante de los anticuerpos de dominio único etiquetados con His6 (VHH) contra hBMP6.6.
El ensamblaje en las superficies de la beta-ciclodextrina (βCD) a través de las interacciones de adamantilo (Ad) y ácido N-nitrilotriacético (NTA) -histidina (His).
Caracterización mediante la impresión de microcontacto (μCP), la resonancia plasmónica de superficie (SPR) y la termoforesis a microescala (MST).
Evaluación de la actividad biológica a través de ensayos de fosfatasa alcalina (ALP) en experimentos de diferenciación celular.

Principales resultados:

Se ensamblaron con éxito capas homogéneas y reversibles de anticuerpos VHH en superficies βCD.
La proteína morfogenética ósea humana 6 (hBMP6) fue efectivamente inmovilizada en las superficies funcionalizadas.
La hBMP6 inmovilizada demostró actividad biológica, promoviendo la diferenciación osteogénica temprana en las células progenitoras.
La estrategia supramolecular proporcionó afinidad, reversibilidad y control temporal sobre la entrega del factor de crecimiento.

Conclusiones:

La estrategia supramolecular desarrollada permite un ensamblaje preciso y reversible de los factores de crecimiento.
Este método facilita la entrega funcional de los factores de crecimiento, promoviendo respuestas celulares específicas.
El enfoque es prometedor para aplicaciones en medicina regenerativa y biomateriales.

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