A bioerodible composition for delivery of a bioactive agent is the reaction product of a reaction mixture which includes an oxidized dextran solution, and a mixture of solids containing a dihydrazide, a bioactive agent, and optionally a pH adjusting agent in an amount sufficient to achieve a pH of the reaction mixture of 6 or less. The composition may include a release agent for the controlled release of the bioactive agent from the composition. A bioactive agent may therefore be administered to a body site in need of the same by providing a first aliquot portion of a reaction mixture comprising an oxidized dextran solution, and a second aliquot portion of a reaction mixture comprising a mixture of solids comprised of a dihydrazide, a bioactive agent, and a solid acid which is present in an amount sufficient to achieve a pH of the reaction mixture of 6 or less, mixing the first and second aliquot portions to form the reaction mixture thereof, and thereafter installing the reaction mixture at the body site and allowing a solidified bioerodible drug delivery composition to be formed thereby in situ. The present invention may be provided in the form of a kit comprised of a double syringe which respectively contains the first and second aliquot portions of the reaction mixture so that the same may be mixed just prior to use.
一种可
生物降解的组合物,用于释放
生物活性剂,是由反应混合物反应产生的,该混合物包括氧化的
右旋糖溶液、一种含有双
肼、
生物活性剂和可选的pH调节剂的固体混合物,其量足以使反应混合物的pH为6或更低。该组合物可以包括释放剂,以控制从组合物中释放
生物活性剂。因此,可以通过提供包括氧化的
右旋糖溶液的第一等分部和包括由双
肼、
生物活性剂和固体酸组成的固体混合物的第二等分部的反应混合物的第一等分部和第二等分部混合来将
生物活性剂给予需要该剂量的身体部位,并在该部位安装反应混合物,从而在原位形成固化的可
生物降解的药物释放组合物。本发明可以形成一个套件的形式,该套件包括一个双注射器,分别包含反应混合物的第一等分部和第二等分部,以便在使用前混合。