Abstract
Purpose
A novel mesocellular carbon foam (MSU-FC) with a large pore size and a three-dimensional porous structure for the oral delivery of poorly water-soluble drugs was prepared. The goal of this study was to improve in vitro dissolution and in vivo absorption of celecoxib (CEB), a model drug, by means of novel carbon-based nanoparticles prepared from the MSU-FC matrix.
Methods
The MSU-FC matrix was synthesized by an inverse replica templating method using mesocellular silica template. A solvent immersion/evaporation method was used to load the drug molecules. The drug-loaded nanoparticles were characterized for morphology, surface area, particle size, mesoporous structure, crystallinity, solubility and dissolution. The effect of MSU-FC on cell viability was measured using the MTT conversion assay. Furthermore, the oral bioavailability of CEB-loaded MSU-FC in fasted rats was compared with that of the marketed product.
Results
Our results demonstrate that CEB incorporation into the prepared MSU-FC resulted in an approximately 9-fold increase in aqueous solubility in comparison with crystalline CEB. MSU-FC produced accelerated immediate release of CEB in comparison with crystalline CEB (pure CEB powder or marketed formulation) and the drug-loaded conventional mesoporous carbon particles. The relative bioavailability of CEB for CEB-loaded MSU-FC was 172%. In addition, MSU-FC nanoparticles exhibited very low toxicity.
Conclusions
The MSU-FC nanomatrix has been shown to be a promising drug delivery vehicle for improving the dissolution and biopharmaceutical characteristics of poorly water-soluble drugs.
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Acknowledgments and disclosures
This work was generously supported by the National Basic Research Program of China (973 Program) (No.2009CB930300). Dr. David B. Jack is gratefully thanked for correcting English of the manuscript.
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Zhang, Y., Wang, H., Li, C. et al. A Novel Three-Dimensional Large-Pore Mesoporous Carbon Matrix as a Potential Nanovehicle for the Fast Release of the Poorly Water-soluble Drug, Celecoxib. Pharm Res 31, 1059–1070 (2014). https://doi.org/10.1007/s11095-013-1227-9
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DOI: https://doi.org/10.1007/s11095-013-1227-9