2 research outputs found
Additional file 1: of Evaluation of High-Performance Curcumin Nanocrystals for Pulmonary Drug Delivery Both In Vitro and In Vivo
An additional file showing the particle size with different milling times in more detail. (XLSX 10 kb
Smart H<sub>2</sub>O<sub>2</sub>‑Responsive Drug Delivery System Made by Halloysite Nanotubes and Carbohydrate Polymers
A novel
chemical hydrogel was facilely achieved by coupling 1,4-phenylenebisdiboronic
acid modified halloysite nanotubes (HNTs-BO) with compressible starch.
The modified halloysite nanotubes (HNTs) and prepared hydrogel were
characterized by solid-state nuclear magnetic resonance (NMR), Fourier
transform infrared spectroscopy (FTIR), scanning electron microscopy
(SEM), and transmission electron microscope (TEM). The linkage of
B–C in the hydrogel can be degraded into B–OH and C–OH
units in the presence of H<sub>2</sub>O<sub>2</sub> and result in
the degradation of the chemical hydrogel. Pentoxifylline was loaded
into the lumen of the HNTs-BO, and then gave the pentoxifylline-loaded
hydrogel. The drug release profile shows that it was no more than
7% dissolved when using phosphate buffer solution (PBS) as the release
medium. Notably, a complete release (near 90%) can be achieved with
the addition of H<sub>2</sub>O<sub>2</sub> ([H<sub>2</sub>O<sub>2</sub>] = 1 × 10<sup>–4</sup> M), suggesting a high H<sub>2</sub>O<sub>2</sub> responsiveness of the as-formed hydrogel. The drug
release results also show that the “initial burst release”
can be effectively suppressed by loading pentoxifylline inside the
lumen of the HNTs rather than embedding the drug in the hydrogel network.
The drug-loaded hydrogel with H<sub>2</sub>O<sub>2</sub>-responsive
release behavior may open up a broader application in the field of
biomedicine