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    • 42. 发明申请
    • Method for the controlled intracellular delivery of nucleic acids
    • 核酸控制细胞内递送的方法
    • US20140371292A1
    • 2014-12-18
    • US14125914
    • 2012-08-10
    • Ahmed BesheerMatthaus NogaGerhard WinterErnst WagnerDaniel Edinger
    • Ahmed BesheerMatthaus NogaGerhard WinterErnst WagnerDaniel Edinger
    • A61K47/36A61K31/713
    • A61K47/36A61K31/713A61K47/59A61K47/61
    • The present invention relates to a method for the controlled intracellular delivery of nucleic acid molecules into one or more target cells, in particular tumor cells, the method comprising: providing a polymeric complex formed between one or more nucleic acid molecules to be delivered and one or more cationic carrier molecules, wherein at least a part of the one or more carrier molecules in the polymeric complex are covalently attached to hydroxyalkyl starch, and wherein the hydroxyalkyl starch is shielding the polymeric complex; allowing the shielded polymeric complex to get into contact with the one or more target cells; deshielding the polymeric complex by removing the hydroxyalkyl starch; and allowing the deshielded polymeric complex to internalize into the one or more target cells. Removal of the hydroxyalkyl starch can be accomplished enzymatically by exposing the polymeric complex to amylase. The invention also concerns the use of such method for the prevention and/or treatment of a condition selected from the group consisting of cancer, immune diseases, cardiovascular diseases, neuronal diseases, infections, and inflammatory diseases.
    • 本发明涉及将核酸分子受控的细胞内递送到一个或多个靶细胞,特别是肿瘤细胞中的方法,所述方法包括:提供在待递送的一个或多个核酸分子之间形成的聚合物复合物, 更多的阳离子载体分子,其中聚合物络合物中的一个或多个载体分子的至少一部分共价连接到羟烷基淀粉上,并且其中羟烷基淀粉屏蔽聚合复合物; 允许屏蔽聚合物复合物与一个或多个靶细胞接触; 通过除去羟烷基淀粉去除聚合物复合物; 并且允许未屏蔽的聚合物络合物内化到一个或多个靶细胞中。 可以通过将聚合物复合物暴露于淀粉酶来酶促去除羟烷基淀粉。 本发明还涉及使用这种方法来预防和/或治疗选自癌症,免疫疾病,心血管疾病,神经元疾病,感染和炎性疾病的病症。