A series of multiblock copolymers of PLLA\|PEG(PLE) with high molecular weight were synthesized by coupling PLLA\|PEG\|PLLA triblock copolymers with succinic anhydride in the presence of ( N,N\| dimethylamino) pyridin...A series of multiblock copolymers of PLLA\|PEG(PLE) with high molecular weight were synthesized by coupling PLLA\|PEG\|PLLA triblock copolymers with succinic anhydride in the presence of ( N,N\| dimethylamino) pyridine(DMAP) and dicyclohexylcarbodimide (DCC).The results of the viscometry measurement,GPC and 1H\|NMR,elucidated that multiblock PLE copolymers with high content of short PEG segments( M n=2000) had been successfully obtained.The crystallinity of the copolymers was investigated by X\|ray diffraction.Mechanical testing showed that multiblock copolymers had relatively high tensile strength and large elongation.In a word,the measurements showed that the multiblock PLE copolymers had high content of short PEG segments( M n=2000),high molecular weight( M w～100,000),excellent hydrophilicity and mechanical properties.The results of cells cultured on the multiblock PLE copolymer indicated that it might be suitable to be utilized as cell scaffold for tissue engineering.展开更多
目的探讨兔耳软骨细胞与聚羟基丁酯-聚丙交酯复合物(PHB-PLA)的细胞相容性,为进一步以PHB-PLA为支架构建组织工程软骨提供实验依据和理论基础。方法分离、培养的兔耳软骨细胞,接种于PHB-PLA浸泡液及膜片上,四甲基偶氮唑蓝(MTT)法测定细...目的探讨兔耳软骨细胞与聚羟基丁酯-聚丙交酯复合物(PHB-PLA)的细胞相容性,为进一步以PHB-PLA为支架构建组织工程软骨提供实验依据和理论基础。方法分离、培养的兔耳软骨细胞,接种于PHB-PLA浸泡液及膜片上,四甲基偶氮唑蓝(MTT)法测定细胞增殖指数及计算毒级,并在体外培养后组织染色(Masson)及扫描电镜观察细胞的生长状况。设立空白对照组。结果兔耳软骨细胞在PHB-PLA浸泡培养基中生长良好。24、487、2 h MTT法结果与对照组差异无统计学意义;毒性分级为0。组织染色及扫描电镜显示:兔耳软骨细胞生长良好,形态正常,黏附牢固。结论兔耳软骨细胞与PHB-PLA的相容性良好,无毒性,可以用于进一步构建组织工程软骨。展开更多
文摘A series of multiblock copolymers of PLLA\|PEG(PLE) with high molecular weight were synthesized by coupling PLLA\|PEG\|PLLA triblock copolymers with succinic anhydride in the presence of ( N,N\| dimethylamino) pyridine(DMAP) and dicyclohexylcarbodimide (DCC).The results of the viscometry measurement,GPC and 1H\|NMR,elucidated that multiblock PLE copolymers with high content of short PEG segments( M n=2000) had been successfully obtained.The crystallinity of the copolymers was investigated by X\|ray diffraction.Mechanical testing showed that multiblock copolymers had relatively high tensile strength and large elongation.In a word,the measurements showed that the multiblock PLE copolymers had high content of short PEG segments( M n=2000),high molecular weight( M w～100,000),excellent hydrophilicity and mechanical properties.The results of cells cultured on the multiblock PLE copolymer indicated that it might be suitable to be utilized as cell scaffold for tissue engineering.
文摘目的探讨兔耳软骨细胞与聚羟基丁酯-聚丙交酯复合物(PHB-PLA)的细胞相容性,为进一步以PHB-PLA为支架构建组织工程软骨提供实验依据和理论基础。方法分离、培养的兔耳软骨细胞,接种于PHB-PLA浸泡液及膜片上,四甲基偶氮唑蓝(MTT)法测定细胞增殖指数及计算毒级,并在体外培养后组织染色(Masson)及扫描电镜观察细胞的生长状况。设立空白对照组。结果兔耳软骨细胞在PHB-PLA浸泡培养基中生长良好。24、487、2 h MTT法结果与对照组差异无统计学意义;毒性分级为0。组织染色及扫描电镜显示:兔耳软骨细胞生长良好,形态正常,黏附牢固。结论兔耳软骨细胞与PHB-PLA的相容性良好,无毒性,可以用于进一步构建组织工程软骨。
