The present invention is directed to new cationic lipids and intermediates in their synthesis that are useful for transfecting nucleic acids or peptides into prokaryotic or eukaryotic cells. The lipids comprise one or two substituted histidine residues, or similar compounds, linked to a lipophilic moiety. The lipids form a complex when mixed with polyanions such as nucleic acids or peptides. The complexes permit efficient transfer of polyanions into cells, usually without significant toxicity to the cells.
本发明涉及新的阳离子脂质体及其合成中间体,可用于将核酸或肽转染入原核或真核细胞中。该脂质体包括一个或两个取代组
氨酸残基或类似化合物,与一个亲脂性基团相连。当该脂质体与多聚阴离子如核酸或肽混合时,形成复合物。复合物可有效地将多聚阴离子转移至细胞内,通常不会对细胞产生显著毒性。