申请人:The University of Utah Research Foundation
公开号:US20040137050A1
公开(公告)日:2004-07-15
Linear polyethylenimine was modified with sterols, such as cholesterol, in three different geometries: linear shaped (L), T-shaped (T), and a combined linear- and T-shaped (LT), to result in linear polyethylenimine-sterol conjugates. These conjugates were mixed with nucleic acids to form complexes for delivery of the nucleic acids into cells. Mammalian cells transfected with these complexes showed protein expression levels higher than linear polyethylenimine alone, and twice that of branched polyethylenimine, but without any significant loss in cell viability. Methods of making these compositions and methods of using them for gene delivery are also described.
线性聚乙烯亚胺被固醇(如胆固醇)以三种不同的几何形状进行改性:线性形状(L)、T形状(T)和线性和T形状的组合(LT),从而形成线性聚乙烯亚胺-固醇共轭物。这些共轭物与核酸混合形成复合物,用于将核酸传递到细胞中。转染这些复合物的哺乳动物细胞显示出比单独使用线性聚乙烯亚胺更高的蛋白表达水平,且比支化聚乙烯亚胺高出一倍,但没有任何显著的细胞存活率损失。还描述了制备这些组合物的方法以及将其用于基因传递的方法。