The present invention is directed compositions for delivery of RNA interference (RNAi) triggers to integrin positive tumor cells in vivo. The compositions comprise RGD ligand- targeted 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 conjugate) are further covalently linked to an RNAi trigger.
本发明涉及将RNA干扰(RNAi)触发物传递至体内整合素阳性肿瘤细胞的组合物。这些组合物包括以RGD
配体为靶向的两性膜活性
多胺,可逆地修饰为酶可切割二肽-酰胺基苄-
碳酸酯掩蔽剂。修饰掩盖了聚合物的膜活性,而可逆性提供了生理响应性。这些可逆修饰的
多胺(动态多共轭物或共轭物)进一步与RNAi触发物共价连接。