Abstract
We developed a polyethylene glycol (PEG)-based biodegradable hydrogel through disulfide crosslinking of polyethylene oxide sulfide (PEOS). The crosslinking rate was highly dependent on temperature, and incubation at about 40-50 °C was required for efficient crosslinking. The crosslinked PEOS hydrogel showed glutathione-dependent dissolution and corresponding controlled release of a model drug-fluorescein isothiocyanate (FITC)-labeled dextran-because the disulfide bond, the main linker, is selectively degraded in response to the high concentration of glutathione. The temperature-sensitive crosslinking and the hydrogel formation have the potential for use as an injectable biogel precursor, which was confirmed by in situ gel formation in mice.
| Original language | English |
|---|---|
| Pages (from-to) | 58-65 |
| Number of pages | 8 |
| Journal | International Journal of Pharmaceutics |
| Volume | 374 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - 5 Jun 2009 |
Bibliographical note
Funding Information:We thank Hye Ran Koh at Seoul National University for calculation of activation energy and Dr. Byeongmoon Jung at Ewha Womans University for rheological data. This study was supported by a grant of the Korea Healthcare technology R&D Project, Ministry for Health, Welfare and Family Affairs, Republic of Korea (A084285) and the Gene Therapy Project of the Ministry of Science and Technology (M10534030004-08N3403-00410).
Keywords
- Biodegradable
- DDS
- Disulfide
- Hydrogel
- PEG