A conjugate that includes a drug covalently linked to a polymer. Upon administration, the conjugate is digested by an enzyme that is present at the site of administration thereby releasing a therapeutic agent. The conjugate may demonstrate substantially the same pharmacokinetic and pharmacodynamic behavior as the drug itself. A material for controllably releasing a conjugate in response to the local concentration of a molecular indicator. The material includes a plurality of conjugates and a plurality of multivalent cross-linking agents. The polymers of the conjugates include an analog of the indicator within their covalent structure. The multivalent cross-linking agents include cross-link receptors that interact with the indicator analog and thereby cross-link the conjugates. These non-covalent interactions are competitively disrupted when an amount of the molecular indicator is present thereby causing the material to release the conjugate in a manner that is dependent on the local concentration of indicator.
一种共轭物,包括药物与聚合物共价连接。在给药时,该共轭物会被存在给药部位的酶
水解,从而释放治疗剂。该共轭物可能表现出与药物本身相同的药代动力学和药效学行为。一种用于响应分子指示物局部浓度可控释放共轭物的材料。该材料包括多种共轭物和多种多价
交联剂。共轭物的聚合物在其共价结构中包括指示物的类似物。多价
交联剂包括与指示物类似物相互作用的交联受体,从而交联共轭物。当存在一定量的分子指示物时,这些非共价相互作用会被竞争性破坏,从而使材料以依赖于指示物局部浓度的方式释放共轭物。