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    • 9. 发明授权
    • Microparticles
    • 微粒
    • US06936278B2
    • 2005-08-30
    • US10162674
    • 2002-06-06
    • Mats ReslowMonica JönssonKarin LarssonTimo Laakso
    • Mats ReslowMonica JönssonKarin LarssonTimo Laakso
    • A61K9/50A61F2/00A61F13/00A61K9/14A61K9/16
    • A61K9/5073
    • A process for producing microparticles, in which an aqueous solution of purified amylopectin-based starch of reduced molecular weight is prepared, the solution is combined with biologically active substance, an emulsion of starch droplets is formed in an outer phase of polymer solution, the starch droplets are made to gel, the gelled starch particles are dried, and a release-controlling shell is optionally applied to the particles, wherein at least one buffer substance having the ability of keeping the pH of the produced microparticles above 3 if exposing the microparticles to an aqueous evironment is added at any stage during the process.Microparticles which essentially consist of said starch, have an amino acid content of less than 50 μg and have no covalent chemical cross-linking and which have the aktivity of keeping the pH above 3 if exposed to a aqueous environment.
    • 制备微粒的方法,其中制备了分子量降低的纯化支链淀粉基淀粉的水溶液,该溶液与生物活性物质组合,在聚合物溶液的外相中形成淀粉液滴的乳液,淀粉 使凝胶凝胶化,凝胶化淀粉颗粒被干燥,并且任选地将颗粒释放控制壳,其中至少一种缓冲物质,如果将微粒暴露于所述微粒上,则具有将所产生的微粒的pH保持在3以上的能力 在该过程的任何阶段加入水性环境。 基本上由所述淀粉组成的微粒具有小于50mug的氨基酸含量并且没有共价的化学交联,并且如果暴露于水性环境中,其具有保持pH高于3的活性。