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    • 5. 发明授权
    • PLA/PLGA oligomers combined with block copolymers for enhancing solubility of a drug in water
    • PLA / PLGA低聚物与嵌段共聚物结合,以增加药物在水中的溶解度
    • US06592899B2
    • 2003-07-15
    • US09971082
    • 2001-10-03
    • Kirk Dee FowersGaylen M. ZentnerChung ShihAi-Zhi Piao
    • Kirk Dee FowersGaylen M. ZentnerChung ShihAi-Zhi Piao
    • A61K914
    • A61K47/34C08L67/04C08L2666/18
    • Polymeric compositions having improved capability of solubilizing a drug in a hydrophilic environment to form a solution, comprising: a biodegradable polyester oligomer; and biodegradable AB-type, ABA-type, or BAB-type block copolymers are disclosed. The copolymers are comprised of about 50.1 to 65% by weight of a biodegradable, hydrophobic A polymer block comprising a biodegradable polyester, and about 35 to 49.9% by weight of a hydrophilic B polymer block comprising a polyethylene glycol (PEG), and wherein the block copolymer has a weight averaged molecular weight of between 2400 to 4999. The biodegradable polyester oligomer of said composition is within a range of 0.01% to 30% by weight of the total polymer mixture, and the content of the biodegradable AB-type, ABA-type, or BAB-type block copolymer is within a range of 70% to 99.99% by weight of the total polymer mixture.
    • 具有改善在亲水环境中溶解药物以形成溶液的能力的聚合物组合物,包括:可生物降解的聚酯低聚物; 并且公开了可生物降解的AB型,ABA型或BAB型嵌段共聚物。 共聚物由约50.1至65重量%的包含可生物降解聚酯的可生物降解的疏水性A聚合物嵌段和约35至49.9重量%的包含聚乙二醇(PEG)的亲水性B聚合物嵌段组成,并且其中 嵌段共聚物的重均分子量在2400至4999之间。所述组合物的可生物降解的聚酯低聚物在总聚合物混合物的重量的0.01%至30%的范围内,并且可生物降解的AB型,ABA的含量 型或BAB型嵌段共聚物在总聚合物混合物的70重量%至99.99重量%的范围内。
    • 9. 发明授权
    • Agent delivering system comprised of microparticle and biodegradable gel with an improved releasing profile and methods of use thereof
    • 由微粒和可生物降解的凝胶组成的具有改进的释放特征的药剂递送系统及其使用方法
    • US06287588B1
    • 2001-09-11
    • US09559507
    • 2000-04-27
    • Chung ShihGaylen M. Zentner
    • Chung ShihGaylen M. Zentner
    • A61F200
    • A61K47/34A61K9/06
    • A composition and method for releasing a bio-active agent or a drug within a biological environment in a controlled manner is disclosed. The composition is a dual phase polymeric agent-delivery composition comprising a continuous biocompatible gel phase, a discontinuous particulate phase comprising defined microparticles and an agent to be delivered. A microparticle containing a bio-active agent is releasably entrained within a biocompatible polymeric gel matrix. The bio-active agent release may be contained in the microparticle phase alone or in both the microparticles and the gel matrix. The release of the agent is prolonged over a period of time, and the delivery may be modulated and/or controlled. In addition, a second agent may be loaded in some of the microparticles and/or the gel matrix.
    • 公开了以可控制的方式在生物环境中释放生物活性剂或药物的组合物和方法。 组合物是双相聚合物递送组合物,其包含连续的生物相容性凝胶相,包含限定的微粒的不连续颗粒相和待递送的试剂。 含有生物活性剂的微粒可释放地夹带在生物相容性聚合物凝胶基质内。 生物活性剂释放可以单独包含在微粒相中,也可以包含在微粒和凝胶基质中。 试剂的释放在一段时间内延长,并且递送可以被调节和/或控制。 另外,第二种试剂可以装载在一些微粒和/或凝胶基质中。