申请人:Promega Biosciences, Inc.
公开号:US06339173B1
公开(公告)日:2002-01-15
The present invention provides novel amide-based cationic lipids of the general structure:
or a salt, or solvate, or enantiomers thereof wherein; (a) Y is a direct link or an alkylene of 1 to about 20 carbon atoms; (b) R1 is H or a lipophilic moiety; (c) R2, R3, and R4 are positively charged moieties, or at least one but not all of R2,R3, or R4 is a positive moiety and the remaining are independently selected from H, an alkyl moiety of 1 to about 6 carbon atoms, or a heterocyclic moiety of about 5 to about 10 carbon atoms; (d) n and p are independently selected integers from 0 to 8, such that the sum of n and o is from 1 to 16; (e) X− is an anion or polyanion and (f) m is an integer from 0 to a number equivalent to the positive charge(s) present on the lipid; provided that if Y is a direct link and the sum of n and p is 1 then one of either R3 or R4 must have an alkyl moiety of at least 10 carbon atoms.
The present invention further provides compositions of these lipids with polyanionic macromolecules, methods for interfering with protein expression in a cell utilizing these compositions and a kit for preparing the same.
本发明提供了一种新型的基于酰胺的阳离子脂质,其一般结构如下:
或其盐、溶剂合物、对映体,其中;(a) Y是直链或1至约20个碳原子的烷基;(b) R1是H或亲脂性基团;(c) R2、R3和R4是带正电荷的基团,或者R2、R3或R4中至少一个而不是全部是正电荷基团,其余的可独立选择自H、1至约6个碳原子的烷基或约5至约10个碳原子的杂环基团;(d) n和p是独立选择的0至8的整数,使得n和o的总和为1至16;(e) X-是阴离子或多阴离子,(f) m是0到与脂质上存在的正电荷数等效的数字;但如果Y是直链且n和p的总和为1,则R3或R4中的一个必须具有至少10个碳原子的烷基。本发明还提供了这些脂质与多阴离子大分子的组合物,利用这些组合物干扰细胞中蛋白质表达的方法以及用于制备相同的试剂盒。