PEGylation as a tool for the biomedical engineering of surface modified microparticles.

Abstract:

:Microparticles are of considerable interest for drug delivery, vaccination and diagnostic imaging. In order to obtain microparticles with long circulation times, or to provide the prerequisite for tissue specific targeting through decoration with suitable ligands, their surfaces need to be modified such that they become repellent to the adsorption of opsonic proteins and resistant to unspecific phagocytosis. The currently most considered strategy relies on the immobilisation of a poly(ethylene glycol) (PEG) corona onto the microparticles' surface. In the first chapter of this review, we discuss the unique physicochemical properties of PEG, which make it the polymer of choice to render the surfaces of microparticles repellent to the adsorption of proteins and resistant to cellular recognition. Furthermore, we present various technologies for the preparation of microparticles with PEGylated surfaces. Another aspect is the decoration of the PEGylated surfaces with suitable ligands for cell specific recognition and targeting. Finally, we review miscellaneous applications of PEGylated microparticles, mainly focusing on the fields of drug delivery, targeting and vaccination. Although still in its infancy, the PEGylation of microparticles holds promise towards future biomedical applications.

journal_name

J Pharm Sci

authors

Wattendorf U,Merkle HP

doi

10.1002/jps.21350

subject

Has Abstract

pub_date

2008-11-01 00:00:00

pages

4655-69

issue

11

eissn

0022-3549

issn

1520-6017

pii

S0022-3549(16)32764-2

journal_volume

97

pub_type

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