Biodegradable poly(ethylene glycol) hydrogels crosslinked with genipin for tissue engineering applications

Journal of Biomedical Materials Research. Part B, Applied Biomaterials
Kristen L Moffat, Kacey G Marra

Abstract

In this study amino-terminated poly(ethylene glycol) (PEG-diamine) hydrogels were crosslinked with genipin, a chemical naturally derived from the gardenia fruit. Dissolution, swelling, and PEG-genipin release properties were determined. The dissolution studies indicated that the hydrogels are water soluble, and that the dissolution rate was concentration, mass, and temperature dependent. The dissolution rates are easily tailored from 3 min to >100 days. The PEG-genipin release study indicated that the greatest release occurs within the first 24 h of immersion in water, and that incubation at 37 degrees C elicits a greater initial release than samples incubated at room temperature for all genipin concentrations. Through scanning electron microscopy it was observed that the hydrogels are porous, and surface morphology changes before and after swelling. Furthermore, smooth muscle cell (SMC) adhesion studies indicated that the PEG-genipin hydrogel is a suitable substrate for SMC seeding. Overall, the results of these studies indicate that PEG-genipin hydrogels may provide potential scaffolding for a variety of tissue engineering applications.

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Citations

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