摘要
背景:近年来阳离子脂质体成为基因转移较为常用的载体,但应用脂质体对mIMCD-3细胞株进行转染的相关报道较少。目的:探讨脂质体法转染mIMCD-3细胞株的可行性,并通过优化脂质体转染效率的影响因素,获得mIMCD-3的最佳转染条件。方法:以绿色荧光蛋白作为报告基因,采用脂质体LipofectamineTM2000包裹pIRES2-EGFP质粒转染mIMCD-3细胞,分别按照细胞接种密度、DNA用量、DNA与脂质体的比例、不同的质粒抽提方法、血清有无设定分组,观察以上因素对mIMCD-3细胞转染效率的影响。结果与结论:采用脂质体LipofectamineTM 2000转染mIMCD-3细胞,在2×108L-1细胞接种浓度、1μgDNA用量、1:3的DNA与脂质体比例时,转染效率最高。采用美国OMEGA公司生产的E.Z.N.A. Endo-Free Plasmid Mini Kit抽提的质粒能获得更高的转染效率。转染前漂洗细胞后换入无血清培养基比有血清组转染效率高(P<0.01),而转染后6h加入血清不影响转染效率。结果显示,脂质体法转染mIMCD-3细胞株是可行的,通过优化脂质体转染效率的影响因素,获得了mIMCD-3的最佳转染条件,可作为有关研究或应用的参考。
BACKGROUND:Recently,cationic liposome becomes the commonly used vehicles for gene transfer.However,few study reports transfection of mIMCD-3 cell lines mediated by liposome.OBJECTIVE:To approach the feasibility of transfection of mIMCD-3 mediated by liposome and to obtain the optimized transfection condition for mIMCD-3.METHODS:Using green fluorescent protein as reporter gene,the plasmid pIRES2-EGFP was transfected into mIMCD-3 cells with Lipofectamine^TM 2000.To set different groups according to cell density,DNA amount,ratio of DNA and liposome,plasmid extraction methods and serum,and to observe the influences on transfection efficiency by these different factors.RESULTS AND CONCLUSION:The highest transfection efficiency was achieved with the following optimized conditions:2×10^5/L cells,1 g DNA,1:3 ratio of DNA and liposome.Extracting plasmid by E.Z.N.A.Endo-Free Plasmid Mini Kit produced by American OMEGA company obtained higher transfection efficiency.Compared with serum medium,cells culutred with serum-free medium obtained higher transfection efficiency before transfection(P〈0.01),but it had no effect at 6 hours after transfection.Transfection of mIMCD-3 mediated by liposome is feasible,and the optimized transfection condition for mIMCD-3 is obtained.These results may be used as the reference for other studies.
出处
《中国组织工程研究与临床康复》
CAS
CSCD
北大核心
2011年第15期2739-2742,共4页
Journal of Clinical Rehabilitative Tissue Engineering Research