Abstract
As a simple method, bio-patches of band type have been widely used in various medical areas for more than 70 years. Despite their numerous advantages, drawbacks such as a lack of adhesive strength and low efficiency of transdermal drug delivery have limited their application. To improve the convenience of use, a 3D porous chitosan patch was prepared simply by phase separation of a solvent (acidic water)/co-solvent [dimethyl carbonate (DMC)]. As a tackifìer of low cytotoxicity, allyl 2-cyanoacrylate bio-glue was prepolymerized and coated onto the porous chitosan patch. Various properties were examined, such as mechanical strength, efficiency of drug-delivery, morphology, cytotoxicity and degradability. We ascertained that the optimal ratio of co-solvent for achieving a highly porous chitosan patch was DMC at a ratio of 5 %. The resultant drug release by the optimal highly porous chitosan patch was approximately twofold faster than that of the untreated control. The porous patch showed improved efficiency of cell adhesion after culturing in cells for 4 h. After 72 h, the cultured cells showed increased cell proliferation on the porous patches. These results strongly suggest that the chitosan-based porous patches covered with modified cyanoacrylate can be widely used as good adhesive patches in various incidents.
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Lim, J.I., Lee, WK. Preparation of macroporous chitosan patch using co-solvent as a transdermal drug-delivery system. J Porous Mater 21, 783–788 (2014). https://doi.org/10.1007/s10934-014-9825-4
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DOI: https://doi.org/10.1007/s10934-014-9825-4