A new multifunctional mPEG-b-PAA-grafted chitosan copolymer possessing amino and carboxyl groups,mPEG-b-PAA-g-CHI(compound 6) ,was designed for a potential application in gene/drug delivery and synthesized by the meth...A new multifunctional mPEG-b-PAA-grafted chitosan copolymer possessing amino and carboxyl groups,mPEG-b-PAA-g-CHI(compound 6) ,was designed for a potential application in gene/drug delivery and synthesized by the methods of reversible addition-fragmentation chain transfer(RAFT) polymerization of acrylic acid(AA) and grafting reaction of a biodegradable chitosan(CHI) derivative.Completion of the reactions and characterization of the resulting compounds were demonstrated by 1 H NMR,FTIR and gel permeation chtomatography(GPC) studies.The results show that the molar ratio of amino groups to carboxyl groups in the copolymer(compound 6) is 0.41-0.59.展开更多
目的建立丙型肝炎病毒(hepatitis C virus,HCV)抗体分片段检测方法。方法以葡聚糖T500为骨架,将亲和素和HRP标记于葡聚糖的不同位置上,再分别与含有生物素标签的HCV的核心抗原、NS3、NS4B、NS5反应(亲和素及HRP与HCV抗原的摩尔比均为1∶...目的建立丙型肝炎病毒(hepatitis C virus,HCV)抗体分片段检测方法。方法以葡聚糖T500为骨架,将亲和素和HRP标记于葡聚糖的不同位置上,再分别与含有生物素标签的HCV的核心抗原、NS3、NS4B、NS5反应(亲和素及HRP与HCV抗原的摩尔比均为1∶10),制备HCV抗原聚合物,同时结合免疫层析技术建立HCV抗体分片段检测方法。采用建立的方法检测100份正常人和100份HCV感染者的血清样本,分析层析膜上不同抗原条带组合出现的比例,计算特异度和灵敏度,根据特异度和灵敏度指标来确定阴阳性的判定标准。分别采用本实验建立的方法及商业化的蛋白芯片法检测196份临床血清样本,计算两种方法的符合率。结果 HCV抗体分片段检测方法检测200份临床标本的灵敏度为100. 0%,特异性为100. 0%,检测结果的判定标准为:2条带显色为阳性,1条带显色为可疑,需进一步确认。该方法与蛋白芯片法对196份临床血清样本的4种抗体片段检测结果符合率均达98. 0%以上。结论本研究成功建立了HCV抗体分片段检测方法,该方法具有良好的灵敏度及特异度,可用于HCV感染的诊断。展开更多
基金Project(20704011) supported by the National Natural Science Foundation of ChinaProject(09JJ3027) supported by the Natural Science Foundation of Hunan Province,ChinaProject(50725825) supported by the National Science Foundation for Distinguished Young Scholars
文摘A new multifunctional mPEG-b-PAA-grafted chitosan copolymer possessing amino and carboxyl groups,mPEG-b-PAA-g-CHI(compound 6) ,was designed for a potential application in gene/drug delivery and synthesized by the methods of reversible addition-fragmentation chain transfer(RAFT) polymerization of acrylic acid(AA) and grafting reaction of a biodegradable chitosan(CHI) derivative.Completion of the reactions and characterization of the resulting compounds were demonstrated by 1 H NMR,FTIR and gel permeation chtomatography(GPC) studies.The results show that the molar ratio of amino groups to carboxyl groups in the copolymer(compound 6) is 0.41-0.59.
