Abstract
The rhodamine B (RhB) covalently grafted SBA-15-structured mesoporous silica nanoparticles (MSNs-RhB) of high surface area (750 m2 g-1), large pore volume (0.7 cm3 g-1), uniform particle size (about 400 nm) and positively charged surface (29.6 ± 5.0 mV), has been developed as a drug delivery system (SAB@MSNs-RhB) for anti-ROS (reactive oxygen species)/hepatic fibrosis by loading a negatively charged drug salvianolic acid B (SAB). The dosage formulation SAB@MSNs-RhB effectively protected the loaded drug SAB from decomposition. The multi-release experimental results showed that SAB@MSNs-RhB exhibited an outstanding SAB sustained-release property, and relatively high SAB release rates and concentrations in a long term after the consumption of previously released SAB as compared to SAB loaded MSNs (SAB@MSNs) of negatively charged surface (-31.1 ± 2.6 mV). The influences of the drug concentration, incubation time, drug formula and drug carrier on the ROS level, proliferative activity and cytotoxicity of LX-2 cells were evaluated. The results showed that the inhibiting effect of SAB@MSNs-RhB on the ROS level and proliferative activity of LX-2 cells was more remarkable than free SAB in a long term (72 h), and became more intensive with the increase of the sample concentration and the incubation time. SAB@MSNs-RhB enhanced the cellular drug uptake, the drug bioaccessability and efficacy for anti-ROS/hepatic fibrosis via the nanoparticles-mediated endocytosis and the sustained release of the drug. There was no visible cytotoxicity of free SAB, MSNs-RhB and SAB@MSNs-RhB against LX-2 cells in a broad concentration range (0.5-100 μm) and incubation time periods up to 72 h. The blood compatibility of the carrier MSNs-RhB was evaluated by investigating the hemolysis and coagulation behaviors in a broad concentration range (50-500 μg mL-1) under in vitro conditions. The results suggested that MSNs-RhB possessed good blood compatibility.
| Original language | English |
|---|---|
| Pages (from-to) | 7785-7796 |
| Number of pages | 12 |
| Journal | Biomaterials |
| Volume | 31 |
| Issue number | 30 |
| DOIs | |
| State | Published - Oct 2010 |
| Externally published | Yes |
Keywords
- Anti-hepatic fibrosis
- Blood compatibility
- Drug release
- Mesoporous silica
- Nanoparticle
- Salvianolic acid