设计并合成了一系列阳离子脂质作为基因传递的载体。脂质含有缩酮部分作为接头和胆固醇基团作为疏水尾。胆固醇衍生物的框架可以通过稳定双层及其与DNA的复合物来提高脂质体的稳定性,从而提高转染效率。转染后,脂质中的缩酮键在细胞内的酸性环境(pH=2-5)中很容易降解,毒性很小;在细胞外的中性环境中(pH=7),它们作为基因载体应该是稳定的。使用 BL-6、3LL、293、3T3 和 Hela 细胞进行了体外基因转移实验。结果表明,三种脂质的基因转染活性较高,在实验条件下对细胞的毒性最小。
Some novel neutral and cationic lipids bearing cholesteryl groups were synthesized. These lipids contain ketal units as linker bonds which should be easily biodegradable in cells.
Synthesis and Evaluation of Cationic Lipids Bearing Cholesteryl Groups for Gene Delivery In Vitro
A series of cationiclipids were designed and synthesized as vectors for gene delivery. The lipids contain a ketal moiety as a linker and a cholesteryl group as a hydrophobic tail. The framework of cholesteryl derivatives could increase the stability of liposomes by stabilizing the bilayers and their complexes with DNA to improve the transfection efficiency. The ketal bonds in lipids should easily
设计并合成了一系列阳离子脂质作为基因传递的载体。脂质含有缩酮部分作为接头和胆固醇基团作为疏水尾。胆固醇衍生物的框架可以通过稳定双层及其与DNA的复合物来提高脂质体的稳定性,从而提高转染效率。转染后,脂质中的缩酮键在细胞内的酸性环境(pH=2-5)中很容易降解,毒性很小;在细胞外的中性环境中(pH=7),它们作为基因载体应该是稳定的。使用 BL-6、3LL、293、3T3 和 Hela 细胞进行了体外基因转移实验。结果表明,三种脂质的基因转染活性较高,在实验条件下对细胞的毒性最小。