The invention provides a multi-arm block copolymer for use in delivering a variety of bioactive agents. The copolymer of the invention contains a central core from which extend multiple (3 or more) copolymer arms. Each copolymer arm possesses an inner polypeptide segment and an outer hydrophilic polymer segment. Thus, the overall structure of the copolymer comprises an inner core region that includes the central core and the inner polypeptide segment, while the outer core region is hydrophilic in nature. The multi-arm copolymer of the invention is particularly useful for delivery of biologically active agents that can be entrapped within the inner core region.
本发明提供了一种多臂嵌段共聚物,可用于递送各种
生物活性剂。本发明的共聚物含有一个中心核,从中心核延伸出多个(3 个或多个)共聚物臂。每个共聚臂都有一个内部的
多肽段和一个外部的亲
水性聚合物段。因此,共聚物的整体结构包括一个内芯区,其中包括中心芯和内
多肽段,而外芯区则具有亲
水性。本发明的多臂共聚物特别适用于递送可包裹在内核区域的
生物活性剂。