Solid lipid nanoparticles as delivery systems for bromocriptine.

Abstract:

PURPOSE:The present investigation describes a formulative study for the development of innovative drug delivery systems for bromocriptine. METHODS:Solid lipid nanoparticles (SLN) based on different lipidic components have been produced and characterized. Morphology and dimensional distribution have been investigated by electron microscopy and Photon Correlation Spectroscopy. The antiparkinsonian activities of free bromocriptine and bromocriptine encapsulated in nanostructured lipid carriers were evaluated in 6-hydroxydopamine hemilesioned rats, a model of Parkinson's disease. RESULTS:Tristearin/tricaprin mixture resulted in nanostructured lipid carriers with stable mean diameter up to 6 months from production. Bromocriptine was encapsulated with high entrapment efficiency in all of the SLN samples, particularly in the case of tristearin/tricaprin mixture. Bromocriptine encapsulation did not change nanoparticle dimensions. In vitro release kinetics based on a dialysis method demonstrated that bromocriptine was released in a prolonged fashion for 48 h. Tristearin/tricaprin nanoparticles better controlled bromocriptine release. Both free and encapsulated bromocriptine reduced the time spent on the blocks (i.e. attenuated akinesia) in the bar test, although the action of encapsulated bromocriptine was more rapid in onset and prolonged. CONCLUSIONS:It can be concluded that nanostructured lipid carriers encapsulation may represent an effective strategy to prolong the half-life of bromocriptine.

journal_name

Pharm Res

journal_title

Pharmaceutical research

authors

Esposito E,Fantin M,Marti M,Drechsler M,Paccamiccio L,Mariani P,Sivieri E,Lain F,Menegatti E,Morari M,Cortesi R

doi

10.1007/s11095-007-9514-y

subject

Has Abstract

pub_date

2008-07-01 00:00:00

pages

1521-30

issue

7

eissn

0724-8741

issn

1573-904X

journal_volume

25

pub_type

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