A novel antibacterial biomaterial mesh coated by chitosan and tigecycline for pelvic floor repair and its biological performance  

作　　者：Changyan Liang You Ling Feng Wei Lijie Huang Xiaomao Li 

机构地区：[1]Department of Gynecology and Obstetrics,Third Affiliated Hospital of Sun Yat-Sen University,Guangzhou,Guangdong,China [2]National Engineering Laboratory for Regenerative Medical Implant Devices,Guanhao Biotech Group,Guangzhou Juming Biotech Co.,Ltd,Guangzhou,Guangdong,China [3]Department of Neurology,Guangdong Second Provincial General Hospital,Guangzhou,Guangdong,China

出　　处：《Regenerative Biomaterials》2020年第5期483-490,共8页再生生物材料（英文版）

摘　　要：The biomaterials composed of mammalian extracellular matrix(ECM)have a great potential in pelvic floor tissue repair and functional reconstruction.However,bacterial infection does cause great damage to the repair function of biomaterials which is the major problem in clinical utilization.Therefore,the development of biological materials with antimicrobial effect is of great clinical significance for pelvic floor repair.Chitosan/tigecycline(CS/TGC)antibacterial biofilm was prepared by coating CS/TGC nanoparticles on mammalian-derived ECM.Infrared spectroscopy,scanning electron microscopy,bacteriostasis circle assay and static dialysis methods were used to characterize the membrane.MTS assay kit and DAPI fluorescence staining were used to evaluate cytotoxicity and cell adhesion.The biocompatibility was assessed by subabdominal implantation model in goats.Subcutaneous antimicrobial test in rabbit back was used to evaluate the antimicrobial and repairing effects on the infected wounds in vivo.Infrared spectroscopy showed that the composite coating had been successfully modified.The antibacterial membrane retained the main structure of ECM multilayer fibers.In vitro release of biomaterials showed sustained release and stability.In vivo studies showed that the antibacterial biological membrane had low cytotoxicity,fast degradation,good compatibility,anti-infection and excellent repair ability.

关 键 词：chitosan nanoparticles TIGECYCLINE extracellular matrix antibacterial membrane pelvic floor repair 

分 类 号：R318[医药卫生—生物医学工程]