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  • Title: Surface-functionalized nanoparticles for controlled drug delivery.
    Author: Choi SW, Kim WS, Kim JH.
    Journal: Methods Mol Biol; 2005; 303():121-31. PubMed ID: 15923680.
    Abstract:
    Nanoparticles have been extensively investigated in drug-delivery systems. Especially, the effectiveness of the surface-functionalized nanoparticles, which consist of copolymers with functional molecules, is well demonstrated. This chapter describes the complete technique for the preparation of surface-functionalized nanoparticles. Tetracycline with an affinity to bone was chosen as a model material for surface functionalization. There are two steps for the preparation of tetracycline-modified nanoparticles. The first step is the conjugation of poly(D,L-lactide-co- glycolic acid) with tetracycline via carbodiimide chemistry and is the most often employed. Three kinds of techniques--the emulsification-diffusion method, nanoprecipitation, and the dialysis method are used for nanoparticle formation of the resulting copolymer. Prepared nanoparticles having a size <200 nm and a hydrophilic surface layer can be applied for bone-specific drug delivery.
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