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Research Articles

Development of mucoadhesive poly(lactide-co-glycolide) nanoparticles for ocular application

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Pages 29-35 | Received 02 Jul 2009, Accepted 07 Nov 2009, Published online: 29 Dec 2009
 

Abstract

Pilocarpine loaded poly(lactic-co-glycolic acid) (PLGA) nanoparticles were prepared by solvent evaporation method and coated with various mucoadhesive polymers, in particular chitosan, sodium alginate and poloxamers. The size of chitosan-coated nanoparticles was larger than the size of all the other particles obtained. Their surface charge was changed from negative (−22.8 mV) to positive (+61.0 mV). The interaction between mucin and chitosan-coated nanoparticles took place up to six hours according to turbidimetric study. The positive charge of chitosan-coated nanoparticles decreased significantly six hours after incubation in mucin dispersion, which was attributed to their electrostatic interaction. The coating with chitosan could be considered useful approach aiming to prolong nanoparticle residence time after local ocular application.

Acknowledgements

This research was supported by the Fund for Scientific Research – Flanders (F. W. O. Vlaanderen).

Declaration of interest

The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.

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