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    • 4. 发明申请
    • COMPOSITIONS AND METHODS FOR MACROMOLECULAR DRUG DELIVERY
    • 用于大分子药物递送的组合物和方法
    • US20140080766A1
    • 2014-03-20
    • US13978072
    • 2012-01-07
    • Christopher Michael PirieDavid Victor LiuNicole Jie Yeon YangKarl Dane Wittrup
    • Christopher Michael PirieDavid Victor LiuNicole Jie Yeon YangKarl Dane Wittrup
    • A61K47/48A61K31/713
    • A61K47/62A61K31/713A61K47/6825A61K47/6849A61K47/6853
    • The present invention features compositions and methods for delivering a therapeutic agent to the cytoplasm of a cell. We have developed, inter alia, a system in which two or more distinct moieties—at least one therapeutic moiety and at least one potentiating moiety—selectively target and specifically bind cell surface molecules that are then internalized to an intracellular, membrane-bound compartment, such as an endosome. In some embodiments, as discussed further below, a third moiety that induces clustering of the targeted cell surface molecule can also be employed. Regardless of whether the compositions and methods include two or three moieties, the therapeutic agent can be any agent one wishes to deliver to the cytoplasm of a cell, and the potentiating agent can be any agent that destabilizes the intracellular, sub-cellular compartment in which the therapeutic agent is sequestered. The potentiating moiety can include, for example, a lytic agent (i.e., an agent that lyses or otherwise increases the permeability of the membrane of the intracellular compartment containing the therapeutic agent). To direct the various moieties of the system, including the therapeutic, potentiating, and clustering moieties, to a selected cellular target, any of the moieties can include a binding agent that selectively targets and specifically binds a molecule present on the surface of the targeted cell.
    • 本发明的特征在于将治疗剂递送至细胞的细胞质的组合物和方法。 我们特别开发了一种系统,其中两个或多个不同部分 - 至少一个治疗部分和至少一个增强部分 - 选择性地靶向并特异性结合细胞表面分子,然后细胞内分泌到胞内膜结合的隔室, 如内体。 在一些实施方案中,如下文进一步讨论的,也可以使用诱导靶细胞表面分子聚集的第三部分。 不管组合物和方法是否包括两个或三个部分,治疗剂可以是希望递送至细胞的细胞质的任何试剂,并且增效剂可以是使细胞内,亚细胞隔室不稳定的任何试剂,其中 治疗剂被隔离。 增强部分可以包括例如溶解剂(即,裂解或以其它方式增加含有治疗剂的细胞内隔室的膜的渗透性的试剂)。 为了将系统的各个部分(包括治疗性,增强和聚集部分)引导至所选择的细胞靶,任何部分可以包括选择性靶向和特异性结合存在于靶细胞表面上的分子的结合剂 。