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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Pharmacokinetics and pharmacodynamics of intranasally administered selegiline nanoparticles with improved brain delivery in Parkinson's disease.
Nanomedicine : Nanotechnology, Biology, and Medicine 2018 November
Selegiline, a well-known anti-Parkinson agent, is reported to be associated with poor oral bioavailability and safety. Therefore, we formulated selegiline as chitosan nanoparticles and evaluated its pharmacokinetics and pharmacodynamics after intranasal administration to rats relative to those after oral administration. The optimized formulation exhibited spherical nanoparticles with more than 90% drug loading and steady in vitro and ex vivo drug release. Selegiline concentrations in the brain and plasma were 20- and 12-fold higher, respectively, after intranasal administration than after oral administration. Treatment with intranasal nanoparticles was also associated with better performance in locomotor activity, catalepsy, and stride length tests and significantly increased dopamine, catalase activity, and glutathione content in the brain. Therefore, intranasally administered selegiline nanoparticles holds superior therapeutic value compared to oral administration and can be a promising approach for the treatment of Parkinson's disease.
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