Abstract
Aim: The aim of this study was to investigate the brain targeting potential of chitosan-coated oil in water nanoemulsions (CSNEROP) delivered intranasally in haloperidol-induced Parkinson's disease rat models. Methods: Chitosan-coated nanoemulsion (CSNEROP) was developed through aqueous titration followed by a high pressure homogenization method. Results: Gamma-scintigraphy study showed a significantly high mucoadhesive potential of CSNEROP and least for conventional and homogenized formulations. Confocal study showed deep localization of formulations in the brain confirming the permeation potential of CSNEROP. Pharmacokinetic results of CSNEROP in Wistar rat brain and plasma showed a significantly high (p** < 0.005) AUC0→24 and amplified Cmax over i.v treatment group. Neurobehavioral activity (rotarod and swim tests) and biochemical parameters (glutathion, TBARS and SOD) corroborated well with the pharmacokinetic results. The order of dopamine recovery in haloperidol-induced Wistar rats was found to be i.nCSNEROP group>i.nSolnROP group>i.vSolnROP group>haloperidol group. Conclusions: Finally, the investigation demonstrated that intranasal delivery of mucoadhesive nanocarrier might play as a potential candidate in the management of Parkinson's disease and related brain disorders.
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