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.
本发明提供了公式A-B-C的肽衍
生物,其中A是多阳离子核酸结合组分;B是易在细胞内被切割的间隔元素肽;C是细胞表面受体结合组分。本发明还提供了一般式(I)的脂质衍
生物:(P
EG)q-连接剂-间隔元素-阳离子头基-碳骨架-(疏
水链)o,其中:连接剂是易在细胞内被切割的基团;间隔元素是将连接剂与阳离子头基连接的基团;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
生物在非病毒
基因传递系统中有用。