申请人:——
公开号:US20030152623A1
公开(公告)日:2003-08-14
A responsive microgel is provided which responds volumetrically and reversibly to a change in one or more aqueous conditions selected from the group consisting of (temperature, pH, and ionic conditions) comprised of an ionizable network of covalently cross-linked homopolymeric ionizable monomers wherein the ionizable network is covalently attached to an amphiphilic copolymer to form a plurality of ‘dangling chains’ and wherein the ‘dangling chains’ of amphiphilic copolymer form immobile micelle-like aggregates in aqueous solution. A responsive microgel is further provided that comprises at least one therapeutic entity and delivers a substantially linear and sustained release of the therapeutic entity under physiological conditions.
本发明提供了一种响应型微凝胶,该微凝胶可对选自由温度、pH 值和离子条件组成的组中的一种或多种水性条件的变化作出体积上和可逆的响应、和离子条件)组成的共价交联均聚可离子化单体的可离子化网络,其中可离子化网络与两性共聚物共价连接,形成多条 "悬链",两性共聚物的 "悬链 "在水溶液中形成不动的胶束状聚集体。还提供了一种响应性微凝胶,它包含至少一种治疗实体,并能在生理条件下提供治疗实体的线性和持续释放。