鸡胚胎干细胞(cES)以其全能性,在研究胚胎发育生物学和家禽育种等方面有巨大的应用前景。本实验旨在建立cES无饲养层培养体系和对LipofactiminTMLTX(脂质体)介导转染体系进行优化。采用药匙法从新鲜受精蛋中分离获取cES,接种于层粘连蛋...鸡胚胎干细胞(cES)以其全能性,在研究胚胎发育生物学和家禽育种等方面有巨大的应用前景。本实验旨在建立cES无饲养层培养体系和对LipofactiminTMLTX(脂质体)介导转染体系进行优化。采用药匙法从新鲜受精蛋中分离获取cES,接种于层粘连蛋白包被的培养皿,待形成大克隆后,用口吸管剥离法吸取cES克隆进行消化传代,并采用生化和免疫学方法鉴定其干细胞活性。设计质粒量800、900、1 000 ng 3个水平,质粒、脂质体比为1∶1.5、1∶2、1∶2.5体系转染cES。结果表明:无饲养层培养体系体外培养cES细胞能稳定传代至第6代,鉴定结果显示碱性磷酸酶阳性和阶段特异性胚胎抗原1阳性,指明克隆能保持未分化状态;质粒900 ng、质脂比为1∶2时,可获得最佳转染效率72%,为cES的脂质体介导外源基因的转染提供参考。展开更多
Objective:The development of gene carriers for efficient gene delivery into cells has attracted growing attention in recent years.The aim of this study was to achieve a better outcome of AAV-293 cells transfection by ...Objective:The development of gene carriers for efficient gene delivery into cells has attracted growing attention in recent years.The aim of this study was to achieve a better outcome of AAV-293 cells transfection by plasmid DNA.Methods:We studied the optimal condition for higher efficiency of cationic lipid-mediated cell transfection.Four experimental groups were set.Plasmid DNA and liposome were mixed in each groups at different ratios(μg:μL),1:2.5,1:3.5,1:4.0 and 1:5.0,respectively.LacZ gene functioned as reporter gene,measuring the transfection efficiency of the four groups using the method of X-gal staining.Results:When the ratio was 1:3.5,the cell transfection rate was the highest.While the ratio of 1:2.5 recommended by product manual achieve the lowest transfection rate.Their difference had statistical significance.Conclusion:In order to obtain a higher transfection efficiency,optimization on conditions of the ratio of plasmid DNA to liposome is necessary in cell transfection.展开更多
文摘鸡胚胎干细胞(cES)以其全能性,在研究胚胎发育生物学和家禽育种等方面有巨大的应用前景。本实验旨在建立cES无饲养层培养体系和对LipofactiminTMLTX(脂质体)介导转染体系进行优化。采用药匙法从新鲜受精蛋中分离获取cES,接种于层粘连蛋白包被的培养皿,待形成大克隆后,用口吸管剥离法吸取cES克隆进行消化传代,并采用生化和免疫学方法鉴定其干细胞活性。设计质粒量800、900、1 000 ng 3个水平,质粒、脂质体比为1∶1.5、1∶2、1∶2.5体系转染cES。结果表明:无饲养层培养体系体外培养cES细胞能稳定传代至第6代,鉴定结果显示碱性磷酸酶阳性和阶段特异性胚胎抗原1阳性,指明克隆能保持未分化状态;质粒900 ng、质脂比为1∶2时,可获得最佳转染效率72%,为cES的脂质体介导外源基因的转染提供参考。
文摘Objective:The development of gene carriers for efficient gene delivery into cells has attracted growing attention in recent years.The aim of this study was to achieve a better outcome of AAV-293 cells transfection by plasmid DNA.Methods:We studied the optimal condition for higher efficiency of cationic lipid-mediated cell transfection.Four experimental groups were set.Plasmid DNA and liposome were mixed in each groups at different ratios(μg:μL),1:2.5,1:3.5,1:4.0 and 1:5.0,respectively.LacZ gene functioned as reporter gene,measuring the transfection efficiency of the four groups using the method of X-gal staining.Results:When the ratio was 1:3.5,the cell transfection rate was the highest.While the ratio of 1:2.5 recommended by product manual achieve the lowest transfection rate.Their difference had statistical significance.Conclusion:In order to obtain a higher transfection efficiency,optimization on conditions of the ratio of plasmid DNA to liposome is necessary in cell transfection.
