Submit Manuscript  

Article Details


PLGA Nanoparticles for Nose to Brain Delivery of Clonazepam: Formulation, Optimization by 32 Factorial Design, In vitro and In vivo Evaluation

Author(s):

Pranav Shah*, Jayant Sarolia, Bhavin Vyas, Priti Wagh, Kaul Ankur and Mishra Anil Kumar   Pages 1 - 20 ( 20 )

Abstract:


Background: Intranasal administration of biodegradable nanoparticles has been extensively studied for targeting the drug directly to CNS through olfactory or trigeminal route bypassing blood brain barrier.

Objective: The objective of the present study was to optimize Clonazepam loaded PLGA nanoparticles (CLO-PNPs) by investigating the effect of process variables on the responses using 32 full factorial design.

Methods: Effect of two independent factors-amount of PLGA and concentration of Poloxamer 188, were studied at low, medium and high levels on three dependent responses-%Entrapment efficiency, Particle size (nm) and %cumulative drug release at 24hr.

Results: %EE, Particle size and %CDR at 24hr of optimized batch was 63.7%, 165.1 nm and 86.96% respectively. Nanoparticles were radiolabeled with 99mTc and biodistribution was investigated in BALB/c mice after intranasal & intravenous administrations. Significantly higher brain/blood uptake ratios and AUC values in brain following intranasal administration of CLO-PNPs indicated more effective brain targeting of CLO. Higher brain uptake of intranasal CLO-PNPs was confirmed by rabbit brain scintigraphy imaging. Histopathological study performed on goat nasal mucosa revealed no adverse response of nanoparticles. TEM image exhibited spherical shaped particles in nano range. DSC and XRD studies suggested Clonazepam encapsulation within PLGA matrix. The onset of occurrence of PTZ-induced seizures in rats was significantly delayed by intranasal nanoparticles as compared to intranasal & intravenous CLO-SOL.

Conclusion: This investigation exhibits rapid rate and higher extent of CLO transport in brain with intranasal CLO-PNPs suggesting a better option as compared to oral & parenteral route in management of acute status epilepticus.

Keywords:

Clonazepam, nose-to-brain delivery, biodistribution, 32 factorial design, gamma scintigraphy, nanoparticles.

Affiliation:

Maliba Pharmacy College, Bardoli Mahuva Road, Dist. Surat, Gujarat, Maliba Pharmacy College, Bardoli Mahuva Road, Dist. Surat, Gujarat, Maliba Pharmacy College, Bardoli Mahuva Road, Dist. Surat, Gujarat, Maliba Pharmacy College, Bardoli Mahuva Road, Dist. Surat, Gujarat, Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Ministry of Defence, Brig. S. K. Mazumdar Marg, New Delhi –110 054, Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Ministry of Defence, Brig. S. K. Mazumdar Marg, New Delhi –110 054



Read Full-Text article