A new biodegradable crosslinked polyethylene oxide sulfide (PEOS) hydrogel for controlled drug release

  • Heebeom Koo
  • , Geun woo Jin
  • , Hyunseo Kang
  • , Yan Lee
  • , Hye Yeong Nam
  • , Hyung suk Jang
  • , Jong Sang Park

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

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 languageEnglish
Pages (from-to)58-65
Number of pages8
JournalInternational Journal of Pharmaceutics
Volume374
Issue number1-2
DOIs
StatePublished - 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

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