BACKGROUND:Chitosan (CS) holding a good biocompatibility, biodegradability, antibacterial property and hemostasis effect cannot only promote wound healing and tissue repair, but also exhibit sustained-control release when carrying berberine hydrochloride (Bh). Therefore it functions as an excellent antibacterial and hemostatic material. OBJECTIVE:To prepare the porous CS/Bh composite xerogel and observe its antibacterial and hemostatic properties. METHODS:The porous CS/Bh composite xerogel was prepared using freeze-drying method, and its microstructure was characterized by scanning electron microscope and Fourier transform infrared spectrometer. The biocompatibility was detected through MTT assay and the in vitro antibacterial and hemostatic properties were observed through antibacterial test and blood clotting index. RESULTS AND COCNLUSION:The porosity of the CS/Bh composite xerogel was 83.1%-90.5%and almost degraded after 72 hours of immersion in PBS. The in vitro antibacterial and hemostatic properties of the composite xerogel were significantly better than those of CS, which were enhanced with the Bh content increasing. Additionally, the CS/Bh (10%) composite xerogel showed the best hemostatic and antibacterial abilities in vitro. To conclude, the CS/Bh composite xerogel possesses a good biocompatibility and strong hemostatic and antibacterial abilities, which is a promising postoperative antibacterial and hemostatic material.%背景:壳聚糖具有良好的生物相容性、生物可降解性、抗菌性及促凝血性等特点,能促进伤口愈合和组织修复,能担载黄连素并保证其快速稳定释放,可作为良好的抗菌止血材料.目的:制备可降解壳聚糖/黄连素干凝胶,并表征其体外抗菌止血性能.方法:利用冷冻干燥法制备壳聚糖/黄连素干凝胶,并通过扫描电子显微镜、傅里叶红外光谱表征其微观结构,MTT实验探讨其生物相容性,凝血抗菌实验检验其体外凝血抗菌效果.结果与结论:①壳聚糖/黄连素干凝胶的孔隙率为83.1%-90.5%,72 h后基本完全降解于PBS溶液中;②壳聚糖/黄连素干凝胶的体外凝血能力、体外抗菌性能均强于壳聚糖,且随黄连素含量增高而增强;③壳聚糖/黄连素(质量百分比为10%)干凝胶的体外抗菌止血效果最佳;④结果表明,壳聚糖/黄连素干凝胶生物相容性较好且具有较强的抗菌止血效果,可应用为抗菌止血材料.
展开▼
