The present invention is directed compositions for delivery of RNA interference (RNAi) polynucleotides to cells in vivo. The compositions comprise amphipathic membrane active polyamines reversibly modified with enzyme cleavable dipeptide-amidobenzyl-carbonate masking agents. Modification masks membrane activity of the polymer while reversibility provides physiological responsiveness. The reversibly modified polyamines (dynamic polyconjugate or DPC) are further covalently linked to an RNAi polynucleotide or co-administered with a targeted RNAi polynucleotide-targeting molecule conjugate.
本发明涉及用于将RNA干扰(RNAi)多核苷酸传递至体内细胞的组合物。这些组合物包括与酶可切割二肽-酰胺基苄-
碳酸酯掩蔽剂可逆修饰的两性膜活性
多胺。修饰掩蔽了聚合物的膜活性,而可逆性提供了生理响应性。可逆修饰的
多胺(动态多共轭物或
DPC)进一步与RNAi多核苷酸共价连接,或与靶向RNAi多核苷酸的分子结合物共同给药。