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    • 10. 发明授权
    • Extraction process for producing PLGA microspheres
    • 生产PLGA微球的提取工艺
    • US5705197A
    • 1998-01-06
    • US698896
    • 1996-08-16
    • John Van HamontCurt ThiesRobert H. ReidCharles E. McQueenJean A. Setterstrom
    • John Van HamontCurt ThiesRobert H. ReidCharles E. McQueenJean A. Setterstrom
    • A61K9/00A61K9/16A61K9/50A61K38/00A61K39/39C07K14/245
    • A61K39/39A61K9/1647A61K9/5031A61K2039/55555A61K38/00
    • A hybrid evaporation-extraction process for preparing microspheres of a p(DL-lactide-to-glycolide) biodegradable polymer, comprising: a. preparing a lyophilized biologically active material-sucrose matrix; adding acetonitrile solvent to biologically active material-sucrose matrix to form a solution; b. preparing a solution of a biodegradable poly (DL-lactide-co-glycolide) polymer by adding acetonitrile solvent to the polymer; c. adding the biodegradable poly (DL-lactide-co-glycolide) polymer acetonitrile solution to the biologically active material-sucrose acetonitrile solution; d. adding with stirring an oil containing lecithin to the poly (DL-lactide-co-glycolide) polymer-sucrose-biologically active material solution to evaporate acetonitrile and form an emulsion containing microspheres of poly (DL-lactide-co-glycolide) biodegradable polymers; e. adding the emulsion from step d. into a solvent selected from heptane, hexane, pentane or isopropanol; and f. collecting microspheres of poly (DL-lactide-co-glycolide) biodegradable polymers of from 1.0 to about 10.0 micrometers after filtration and washing with a fresh solvent selected from heptane, hexane, pentane or isopropanol.
    • 一种用于制备聚(DL-丙交酯 - 乙交酯)生物可降解聚合物的微球的混合蒸发萃取方法,包括:a。 制备冻干的生物活性物质 - 蔗糖基质; 向生物活性物质蔗糖基质中加入乙腈溶剂形成溶液; b。 通过向聚合物中加入乙腈溶剂制备可生物降解的聚(DL-丙交酯 - 共 - 乙交酯)聚合物的溶液; C。 将可生物降解的聚(DL-丙交酯 - 共 - 乙交酯)聚合物乙腈溶液加入到生物活性物质 - 蔗糖乙腈溶液中; d。 在聚(DL-丙交酯 - 共 - 乙交酯)聚合物 - 蔗糖 - 生物活性物质溶液中搅拌加入含有卵磷脂的油以蒸发乙腈并形成含有聚(DL-丙交酯 - 共 - 乙交酯)可生物降解聚合物微球的乳液; e。 从步骤d中加入乳液。 溶于选自庚烷,己烷,戊烷或异丙醇的溶剂中; 和f。 收集过滤后的聚(DL-丙交酯 - 共 - 乙交酯)生物可降解聚合物的微球体为1.0至约10.0微米,并用选自庚烷,己烷,戊烷或异丙醇的新鲜溶剂洗涤。