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A terpolymeric hydrogel of hyaluronate-hydroxyethyl acrylate-gelatin methacryloyl with tunable properties as biomaterial

Das, Dipankar, Cho, Hana, Kim, Nahye, Pham, Thi Thu Hien, Kim, In Gul, Chung, Eun-Jae, Noh, Insup
Carbohydrate polymers 2019 v.207 pp. 628-639
Fourier transform infrared spectroscopy, adrenal cortex hormones, animal models, biocompatibility, biocompatible materials, cartilage, chemical bonding, chondrocytes, crosslinking, drugs, free radicals, gelatin, hyaluronic acid, hydrogels, mechanical properties, pH, polymerization, scanning electron microscopy, serum albumin, texture, thermogravimetry, tissue engineering, tissue repair
Here, we report synthesis of a terpolymeric covalently crosslinked hydrogel of hyaluronate (HA) as biomaterial with elasticity, mechanical properties and cell interactions via conventional free radical polymerization technique. To provide elasticity and mechanical properties, 2-hydroxyethyl acrylate (HEA) was grafted in HA, while to tune cellular interactions, gelatin methacryloyl (GM) was used as crosslinker. The composition and probable structure of the terpolymer (HA-g-pHEA-x-GM) were analysed by FTIR, 1H HR-MAS-NMR, and TGA analyses. The SEM and texture analyses of hydrogel showed interconnected micro-porous network and high mechanical properties, respectively. In vitro biocompatibility was studied against human chondrocytes, whereas, in vivo biocompatibility and tissue regeneration were confirmed using mouse model. The hydrogel releases model protein-bovine serum albumin, and corticosteroid drug-dexamethasone in a sustain way at pH 7.4 and 37 °C. Overall, the tunable mechanical properties, micro-porous network, and cytocompatibility of the HA-g-pHEA-x-GM hydrogel highlights its potential applicability in cartilage tissue engineering and drug delivery.