Photocrosslinkable gellan gum film as an anti-adhesion barrier

The purpose of this study was to develop a gellan gum-based film which could be photocrosslinked for medical applications. Gellan gum was grafted with cinnamate to yield the photo crosslinkable polymer (gellan gum-cin). This material had 14.7% of its d-galacturonic residues reacted with cinnamate groups and displayed maximum absorption at 254nm. Investigation of the photochemical properties showed that the crosslinking efficiency was 82% after 16min of UV irradiation. The anti-adhesion films prepared from gellan gum-cin polymers exhibited high gel contents (88±2%) and suitable mechanical properties. When implanted into rats, the gellan gum-cin film exhibited the most promising anti-adhesion potential in 2 out of 10 rats without forming any tissue adhesion. Furthermore, the gellan gum-cin film could effectively inhibit inflammation in rats based on the results of fluid leukocyte analyses. The gellan gum-cin film thus has potential in clinical applications.