Improved oral bioavailability of core–shell structured beads by redispersion of the shell-forming nanoparticles: Preparation, characterization and in vivo studies
| Autor: | Longfa Kou, Yilin Tang, Bin Tian, Yanjie Shao, Qing Yao, Xing Tang, Tian Yin, Jingxin Gou, Xiaoguang Tao, Xuechao Li |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Drug Compounding Administration Oral Nanoparticle Bead chemistry.chemical_compound Dogs Colloid and Surface Chemistry Differential scanning calorimetry Microscopy Electron Transmission X-Ray Diffraction Zeta potential Animals Physical and Theoretical Chemistry Dissolution Chromatography Calorimetry Differential Scanning Hydroxypropyl cellulose Surfaces and Interfaces General Medicine Bioavailability Chemical engineering chemistry visual_art Microscopy Electron Scanning visual_art.visual_art_medium Nanoparticles Particle size Biotechnology |
| Zdroj: | Colloids and Surfaces B: Biointerfaces. 113:92-100 |
| ISSN: | 0927-7765 |
| DOI: | 10.1016/j.colsurfb.2013.08.037 |
| Popis: | In order to increase the dissolution rate and oral bioavailability of bifendate, coated beads with core-shell structure were prepared via a combination use of wet media milling method and bead layering process. Hydroxypropyl cellulose (HPC-SL) and sodium lauryl sulfate (SLS) were found to be the best pair to stabilize the nanosuspension during milling process. A 10:1 ratio of mixture of mannitol and SLS was chosen as most suitable coating matrix to maintain the redispersability of dried nanoparticles in the shell of beads. The mean particle size of the nanosuspension was 139 nm and the zeta potential was -20.2 mV. Nanoscale bifendate particles with a mean diameter of 360 nm could be generated when redispersing the prepared beads in water. The differential scanning calorimetry (DSC) and X-ray powder diffraction (XRPD) analysis indicated that the crystalline state of the drug was not changed. The stability test confirmed that coated beads showed no distinct difference in particle size and dissolution velocity during 6 month storage while liquid nanosuspension was stable no more than 3 weeks. Dissolution rate of coated beads was increased significantly compared with commercially available pills. Likewise, the Cmax and AUC (0→24) of nanosuspension based beads in beagle dogs were 2.40-fold and 1.66-fold greater than that of commercially available pills, respectively. The present work is a reliable approach to stabilize nanosuspension based product, and improve dissolution velocity and bioavailability of poor soluble drugs. |
| Databáze: | OpenAIRE |
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