The invention provides a peptide derivative of formula A-B-C wherein A is a polycationic nucleic acid-binding component; B is a spacer element peptide that is susceptible to cleavage within a cell; and C is a cell surface receptor binding component. The invention also provides a lipid derivative of general formula (I): (PEG)
q
-Linker-Spacer-Cationic headgroup-carbon skeleton-(hydrophobic chain)
o
wherein: the Linker is a group susceptible to cleavage within a cell; the Spacer is a group linking the Linker to the Cationic headgroup; q denotes the number of PEG chains and q=1, 2 or 3; o denotes the number of hydrophobic chains and o=1, 2 or 3; the carbon skeleton is a group linking the hydrophobic chains to the cationic headgroup. The peptide and lipid derivatives find use in non-viral gene delivery systems.
该发明提供了一个公式为A-B-C的肽衍
生物,其中A是多阳离子核酸结合组分;B是易在细胞内被裂解的间隔元素肽;C是细胞表面受体结合组分。该发明还提供了一个一般公式(I)的脂质衍
生物:(P
EG)q-连接物-间隔物-阳离子头基-碳骨架-(疏
水链)o,其中:连接物是易在细胞内被裂解的基团;间隔物是连接连接物和阳离子头基的基团;q表示P
EG链的数量,q=1、2或3;o表示疏
水链的数量,o=1、2或3;碳骨架是将疏
水链连接到阳离子头基的基团。这些肽和脂质衍
生物可用于非病毒
基因传递系统。