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Factors Affecting the Production of Nanostructure Lipid Carriers of Valproic Acid Publisher Pubmed



Varshosaz J1 ; Eskandari S1 ; Kennedy R2 ; Tabbakhian M1 ; Minaiyan M3
Authors
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Authors Affiliations
  1. 1. Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Center, Isfahan University of Medical Sciences, Isfahan, 81745-359, Iran
  2. 2. School of Biomedical Sciences, Charles Sturt University, Wagga Wagga, 2678, Australia
  3. 3. Department of Pharmacology, School of Pharmacy and Isfahan Pharmaceutical Sciences Research Center, Isfahan University of Medical Sciences, Isfahan, 81745-359, Iran

Source: Journal of Biomedical Nanotechnology Published:2013


Abstract

The objective of this study was to optimize a nano-lipid carrier (NLCs) of valproic acid for nasal delivery using statistical methods. NLCs were prepared by solvent diffusion method followed by ultrasonication. After a preliminary screening study using Taguchi design, the Box-Behnken statistical model using desirability function was applied to evaluate variables affecting key specifications (minimum particle size, maximum drug loading and optimum release) of nano-lipid carriers of valproic acid. Each variable was assessed at three levels of surfactant concentration, acetone/ethanol volume ratio and organic/aqueous phase volume ratio. The best predicted model for particle size and drug release was quadratic model, while for drug loading, 2 factor interaction model fitted better. The measured results for the optimized formulation were a mean size of 154 nm, 47% payload and 75% of drug content released within 21 days. The optimum formulation was obtained using 1% of Poloxamer-188 as surfactant, organic/aqueous phase volume ratio of 1/5 and acetone/ethanol volume ratio of 3/1. Overall, the results show that entrapment of valproic acid in nano-lipid carriers was achieved. Such carriers might be a promising delivery system in the treatment of seizures via the nasal route of administration. Copyright © 2013 American Scientific Publishers All rights reserved.
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