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    • 4. 发明申请
    • METHOD OF PREPARING COVERED POROUS BIODEGRADABLE POLYMER MICROSPHERES FOR SUSTAINED-RELEASE DRUG DELIVERY AND TISSUE REGENERATION
    • 制备覆盖多孔生物可降解聚合物微球的方法,用于持续释放药物递送和组织再生
    • US20090317478A1
    • 2009-12-24
    • US12255163
    • 2008-10-21
    • Dong Keun HANKwideok ParkJae-Jin KimJun Sik SonSoon Eon Bae
    • Dong Keun HANKwideok ParkJae-Jin KimJun Sik SonSoon Eon Bae
    • A61K9/14A61K38/21
    • A61K9/1647A61K9/1694A61K38/00
    • The present invention relates to covered porous biodegradable polymer microspheres for sustained-release drug delivery and tissue regeneration which has an interconnected inner open pore structure having a wide surface area and high porosity and an outer closed pore structure in which the surface of the microsphere is covered with a thin layer of a biodegradable polymer, and thereby the pores formed on the surface and exposed to the outside are closed; and methods for preparing the same. Due to such a characteristic pore structure, the covered porous biodegradable polymer microspheres according to the present invention can prevent the biologically active material from being excessively released in the early stage immediately after administration, and after that, can gradually release the biologically active material through the interconnected inner pore structure over a prolonged period as the biodegradable polymer thin layer is degraded. Therefore, the microsphere of the present invention can be effectively used for sustained-release drug delivery and tissue regeneration.
    • 本发明涉及用于持续释放药物递送和组织再生的覆盖多孔可生物降解聚合物微球,其具有互连的具有宽表面积和高孔隙率的内开孔结构以及微球表面被覆盖的外封闭孔结构 具有可生物降解聚合物的薄层,从而形成在表面上并暴露于外部的孔闭合; 及其制备方法。 由于这样的特征性的孔结构,本发明的被覆多孔生物降解性聚合物微球体可以防止生物活性物质在给药后立即早期过度释放,之后可以通过使用生物活性物质逐渐释放生物活性物质 随着可生物降解的聚合物薄层的退化,延长的互连内孔结构。 因此,本发明的微球体可以有效地用于缓释药物递送和组织再生。