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具有形状回复能力的季铵化壳聚糖/氧化细菌纤维素冷冻凝胶,用于非压迫性出血和伤口愈合。

Quaternized chitosan/oxidized bacterial cellulose cryogels with shape recovery for noncompressible hemorrhage and wound healing.

机构信息

Institute of Chemicobiology and Functional Materials, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei, Nanjing, Jiangsu Province, China.

Jinling Hospital, Medical School of Nanjing University, 305 East Zhongshan Road, Nanjing, Jiangsu Province, China.

出版信息

Carbohydr Polym. 2024 Mar 1;327:121679. doi: 10.1016/j.carbpol.2023.121679. Epub 2023 Dec 13.

Abstract

Management of noncompressible torso hemorrhage is an urgent clinical requirement, desiring biomaterials with rapid hemostasis, anti-infection and excellent resilient properties. In this research, we have prepared a highly resilient cryogel with both hemostatic and antibacterial effects by chemical crosslinking and electrostatic interaction. The network structure crosslinked by quaternized chitosan and genipin was interspersed with oxidized bacterial cellulose after lyophilization. The as-prepared cryogel can quickly return to the original volume when soaking in water or blood. The appropriately sized pores in the cryogel help to absorb blood cells and further activate coagulation, while the quaternary ammonium salt groups on quaternized chitosan inhibit bacterial infections. Both cell and animal experiments showed that the cryogel was hypotoxic and could promote the regeneration of wound tissue. This research provides a new pathway for the preparation of double crosslinking cryogels and offers effective and safe biomaterials for the emergent bleeding management of incompressible wounds.

摘要

非压缩性躯干出血的处理是一项紧急的临床需求,需要具有快速止血、抗感染和出色弹性性能的生物材料。在这项研究中,我们通过化学交联和静电相互作用制备了一种具有止血和抗菌作用的高弹性水凝胶。用季铵化壳聚糖和京尼平交联的网络结构在冻干后穿插氧化细菌纤维素。所制备的水凝胶在浸泡在水或血液中时可以迅速恢复到原始体积。水凝胶中的适当大小的孔有助于吸收血细胞并进一步激活凝血,而季铵化壳聚糖上的季铵盐基团抑制细菌感染。细胞和动物实验均表明水凝胶的毒性较低,能够促进伤口组织的再生。这项研究为双交联水凝胶的制备提供了新途径,为不可压缩性伤口的紧急出血管理提供了有效且安全的生物材料。

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