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    • 41. 发明授权
    • Preparation and use of steroid-polyanionic polymer-based conjugates
targeted to vascular endothelial cells
    • 针对血管内皮细胞的类固醇 - 聚阴离子聚合物基缀合物的制备和使用
    • US5474765A
    • 1995-12-12
    • US856018
    • 1992-03-23
    • Philip E. Thorpe
    • Philip E. Thorpe
    • A61K47/48C08L5/12A61K31/74
    • A61K47/48176A61K47/4823
    • This invention discloses new targeted conjugates for the delivery of a compound, and particularly, a steroid, to vascular endothelial cells. The conjugates comprise two components, preferably linked by a selectively-hydrolyzable bond, such as an acid-labile bond or enzyme-sensitive bond. The first component, a polyanionic polymer, and preferably, a polysulphated polymer such as a heparin-derivative, specifically directs the conjugate to vascular endothelial cells. The second component is a selected agent, such as asteroid, which exerts a specific effect on the target cell following its release. In particular, the present invention provides novel conjugated angiogenesis inhibitors, for use in the treatment of pathogenic conditions including cancer, arthritis, and diabetic blindness. An inhibitor comprising a heparin derivative and the anti-angiogenic steroid, cortisol, is herein shown to be markedly acid-labile, to suppress DNA synthesis and cell migration in human umbilical vein endothelial cells, to retard or abolish (depending on the route of injection) the vascularization of sponges in vivo and to retard lung tumor growth in mice by 65%. No adverse effects of the conjugate were detected, and equivalent treatments with a mixture of heparin plus cortisol were significantly less effective in all cases.
    • 本发明公开了用于向血管内皮细胞递送化合物,特别是类固醇的新靶向缀合物。 缀合物包含两个组分,优选通过选择性可水解键连接,例如酸不稳定键或酶敏感键。 第一组分,聚阴离子聚合物,优选多硫酸化聚合物如肝素衍生物,特异性地将缀合物引导至血管内皮细胞。 第二个组件是所选择的试剂,例如小行星,其在释放后对靶细胞发挥特定的作用。 特别地,本发明提供了用于治疗包括癌症,关节炎和糖尿病失明的病原性病症的新型共轭血管生成抑制剂。 本文显示包含肝素衍生物和抗血管生成类固醇皮质醇的抑制剂显着酸性不稳定,以抑制人脐静脉内皮细胞中的DNA合成和细胞迁移,以延缓或消除(取决于注射途径 )海绵体内血管化,并将小鼠肺肿瘤生长阻滞65%。 没有检测到结合物的不良反应,并且在所有情况下用肝素加皮质醇的混合物的等效处理显着较差。