Title:Fabrication of Chitosan-coated Mesoporous Silica Nanoparticles Bearing Rosuvastatin as a Drug Delivery System
Volume: 19
Issue: 1
Author(s): Mojdeh Rahnama Ghahfarokhi, Ghasem Dini*Behrooz Movahedi
Affiliation:
- Department of Nanotechnology, Faculty of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
Keywords:
Mesoporous silica nanoparticles, chitosan, rosuvastatin, characterization, drug delivery system, pH-responsive feature.
Abstract: Aim: In this work, to improve the solubility and bioavailability of the rosuvastatin
(RSV) drug, chitosan-coated mesoporous silica nanoparticles (CS-MSNs) as a drug delivery system
were fabricated.
Methods: To do this, first MSNs with a maximum specific surface area were synthesized from sodium
silicate as silica source and different molar ratios of cethyl trimethylammonium bromide
(CTAB) and pluronics (P123, PEO20PPO17PEO20) as surfactants via the sol-gel process. Then, the
synthesized MSNs were coated by CS polymer with the help of (3-glycidoxypropyl)methyldiethoxysilane
(GPTMS) as a linker between MSNs and CS. Subsequently, the RSV drug was loaded
into the synthesized CS-coated MSNs. The products were characterized by different techniques,
including X-ray diffraction (XRD), the Brunauer-Emmett-Teller (BET), scanning electron microscopy
(SEM), dynamic light scattering (DLS), and Fourier-transform infrared spectroscopy (FTIR).
The in vitro drug release profile of the fabricated DDS was evaluated in a typical phosphate-buffered
saline (PBS) solution at different pH values (i.e., 4, 6, and 7.4) for 48 h. To assess the cytotoxicity,
the viability of the human fibroblast cells exposed to the fabricated DDS was also examined.
Results: The results showed that at an optimal molar ratio of P123/CTAB, the amorphous MSNs
with a specific surface area of about 1080 m2/g, a pore diameter of 4 nm, a pore volume of 1.1
cm3/g, and an average size of about 30 nm were synthesized. Also, the presence of all the components,
including the CS coating and the RSV drug, was confirmed in the structure of the fabricated
DDS by FTIR analysis. Due to the pH-responsive feature of the CS coating, the RSV drug release
from the fabricated DDS showed a reasonable environmental response; as the pH value of the PBS
solution decreased, the degree of drug release increased.
Conclusion: The CS coating enhanced the cytotoxicity of the fabricated DDS and led to sustainable
drug release behavior, which would provide a beneficial approach for drug delivery technology.