Author(s): Silva, SS ; Rodrigues, Luísa Cidália Guimarães ; Fernandes, Emanuel Mouta ; Soares da Costa, Diana ; Villalva, Denise G. ; Loh, Watson ; Reis, R. L.
Date: 2023
Persistent ID: https://hdl.handle.net/1822/87004
Origin: RepositóriUM - Universidade do Minho
Subject(s): Chitosan; Virgin coconut oil; Cubosomes; Emulsion system; Porous structures; Biomedical applications
Emulsion-based systems that combine natural polymers with vegetable oils have been identified as a promising research avenue for developing structures with potential for biomedical applications. Herein, chitosan (CHT), a natural polymer, and virgin coconut oil (VCO), a resource obtained from coconut kernels, were combined to create an emulsion system. Phytantriol-based cubosomes encapsulating sodium diclofenac, an anti-inflammatory drug, were further dispersed into CHT/VCO- based emulsion. Then, the emulsions were frozen and freeze-dried to produce scaffolds. The scaffolds had a porous structure ranging from 20.4 to 73.4 µm, a high swelling ability (up to 900%) in PBS, and adequate stiffness, notably in the presence of cubosomes. Moreover, a well-sustained release of the entrapped diclofenac in the cubosomes into the CHT/VCO-based system, with an accumulated release of 45 ± 2%, was confirmed in PBS, compared to free diclofenac dispersed (80 ± 4%) into CHT/VCO-based structures. Overall, the present approach opens up new avenues for designing porous biomaterials for drug delivery through a sustainable pathway.
