Using Alendronic Acid Coupled Fluorescently Labelled SM Liposomes as a Vehicle for Bone Targeting


Medina OP, Medina TP, Humbert J, Bao Q, Baum W, Will O, Damm T, Glüer C

Year of publication:





Journal (long):

Current Pharmaceutical Design

Journal (short):

Curr. Pharm. Des.

Impact factor:



Background: We have recently developed a liposomal nanoparticle system that can be used for drug delivery and simultaneously be monitored by optical or photoacoustic imaging devices. Here we tested the efficacy of alendronate as a homing molecule in SM-liposomes for bone targeting.

Methods: Alendronate was immobilized covalently on the liposomal surface and the fluorescent dye indocyanine green was used as a payload in the liposomes. The indocyanine green delivery was analyzed by 3D optical tomography, optical fluorescence scanner, photoacoustic imaging, and by exvivo biodistribution studies.

Results: The results show that the alendronate coupled to the liposomal surface increases Sphingomyelin containing liposome targeting up to several fold.

Conclusion: The alendronate targeted liposomes open possibilities for an application in active bone targeting.

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