Si Haopeng, Xing Tianlong, Ding Yulong, Zhang Hongbo, Yin Ruixue, Zhang Wenjun
School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China.
Black Flame Biomedical Lt.D, Shanghai 201318, China.
Polymers (Basel). 2019 Sep 27;11(10):1584. doi: 10.3390/polym11101584.
Hyaluronic acid (HA)-based hydrogels are widely used in biomedical applications due to their excellent biocompatibility. HA can be Ultraviolet (UV)-crosslinked by modification with methacrylic anhydride (HA-MA) and crosslinked by modification with 3,3'-dithiobis(propionylhydrazide) (DTP) (HA-SH) via click reaction. In the study presented in this paper, a 3D-bioprinted, double-crosslinked, hyaluronic-acid-based hydrogel for wound dressing was proposed. The hydrogel was produced by mixing HA-MA and HA-SH at different weight ratios. The rheological test showed that the storage modulus (G') of the HA-SH/HA-MA hydrogel increased with the increase in the HA-MA content. The hydrogel had a high swelling ratio and a high controlled degradation rate. The degradation test showed that the hydrogel at the HA-SH/HA-MA ratio of 9:1 (S9M1) degraded by 89.91% ± 2.26% at 11 days. The rheological performance, drug release profile and the cytocompatibility of HA-SH/HA-MA hydrogels with loaded Nafcillin, which is an antibacterial drug, were evaluated. The wound dressing function of this hydrogel was evaluated by Live/Dead staining and CCK-8 assays. The foregoing results imply that the proposed HA-SH/HA-MA hydrogel has promise in wound repair applications.
基于透明质酸(HA)的水凝胶因其优异的生物相容性而被广泛应用于生物医学领域。HA可通过甲基丙烯酸酐改性进行紫外(UV)交联(HA-MA),并通过点击反应与3,3'-二硫代双(丙酰肼)(DTP)改性交联(HA-SH)。在本文提出的研究中,一种用于伤口敷料的3D生物打印、双交联、基于透明质酸的水凝胶被提出。该水凝胶通过以不同重量比混合HA-MA和HA-SH制备。流变学测试表明,HA-SH/HA-MA水凝胶的储能模量(G')随HA-MA含量的增加而增加。该水凝胶具有高溶胀率和高可控降解率。降解测试表明,HA-SH/HA-MA比例为9:1(S9M1)的水凝胶在11天时降解了89.91%±2.26%。对负载抗菌药物萘夫西林的HA-SH/HA-MA水凝胶的流变性能、药物释放曲线和细胞相容性进行了评估。通过活/死染色和CCK-8测定评估了该水凝胶的伤口敷料功能。上述结果表明,所提出的HA-SH/HA-MA水凝胶在伤口修复应用中具有前景。