Formulation of spray-dried phenytoin loaded poly(ε-caprolactone) microcarrier intended for brain delivery to treat epilepsy
✍ Scribed by Zhuzhu Li; Qingxiu Li; Sindee Simon; Necip Guven; Karin Borges; Bi-Botti C. Youan
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 282 KB
- Volume
- 96
- Category
- Article
- ISSN
- 0022-3549
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✦ Synopsis
This study evaluates the efficacy of the spray-drying technique in the bioengineering of phenytoin (PHT) containing poly(e-caprolactone) (PCL) microcarrier intended for brain delivery for long-term treatment of epilepsy. Through orthogonally designed experiments, the optimal formulation and process variables for the preparation of PCL-microcarriers containing PHT were obtained. The produced microcarriers were characterized by coulter counter, scanning electron, scanning transmission electron microscopies, differential scanning calorimetry, powder X-ray diffraction, and in vitro release. The results showed that the produced microcarriers have a spherical structure, uniform size distribution, and a particle mean diameter of about 4.0 mm, which is suitable for brain delivery. The PHT was loaded as dispersed microcrystals within the PCL-microcarriers. From this system, PHT was released slowly into a buffer solution for approximately 14 days without any burst effect. These data suggested that PHT containing spray-dried PCL-microcarrier may be a promising drug delivery system for local brain delivery and long-term treatment of pharmacoresistant epilepsy.