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    • 35. 发明授权
    • Hydroxyapatite-targeting multiarm polymers and conjugates made therefrom
    • 羟基磷灰石靶向多聚体聚合物和由其制成的共轭物
    • US08440787B2
    • 2013-05-14
    • US12738980
    • 2008-10-23
    • Samuel P. McManusAntoni Kozlowski
    • Samuel P. McManusAntoni Kozlowski
    • C08G79/00C08G65/327
    • A61K47/48215A61K47/24A61K47/548A61K47/58A61K47/60A61K47/641
    • The present invention provides hydmoxyapatite-targeting, multiarm polymer reagents suitable for reaction with biologically active agents to form conjugates, the polymeric reagents comprising one or more polymer chains and a plurality of hydroxyapatile-targeting moieties located at the terminus of one or more of the polymer chains. The multiarm polymers are optionally divided or separated by one or more degradable linkages into polymer segments having a molecular weight suitable for renal clearance. The polymeric reagents of the invention can have a substantially linear structure, although branched or multiarm structures are contemplated as well. The invention is suited for applications in which use of a high molecular weight polymer is desired, such as a total polymer number average molecular weight of at least about 30,000 Da for linear polymers and 20,000 Da for multiarm polymers. Each structure includes one or more linkages capable of degradation in vivo. The use of multiple hydroxyapatite-targeting moieties on each polymer molecule enhances the ability of the polymer reagent to selectively target and bind to hydroxyapatite surfaces, which in turn, can increase the concentration of biologically active moiety delivered to the bone site.
    • 本发明提供了适于与生物活性剂反应以形成共轭物的羟基磷灰石靶向的多聚体聚合物试剂,所述聚合物试剂包含一个或多个聚合物链和位于聚合物中的一种或多种聚合物的末端的多个羟基磷酸酯靶向部分 链条 多聚物聚合物任选地被一个或多个可降解键分开或分离成具有适合于肾清除的分子量的聚合物链段。 本发明的聚合物试剂可以具有基本上线性的结构,尽管也考虑了分支或多臂结构。 本发明适用于需要使用高分子量聚合物的应用,例如线性聚合物的总聚合物数均分子量为至少约30,000Da,多聚聚合物为20,000Da。 每个结构包括能够在体内降解的一种或多种键。 在每个聚合物分子上使用多个羟基磷灰石靶向部分增强了聚合物试剂选择性地靶向和结合羟基磷灰石表面的能力,这进而可以增加递送至骨部位的生物活性部分的浓度。