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    • 9. 发明授权
    • Soluble, degradable poly(ethylene glycol) derivatives for controllable release of bound molecules into solution
    • 可溶性,可降解的聚(乙二醇)衍生物,用于将结合分子可控地释放到溶液中
    • US07655747B2
    • 2010-02-02
    • US11051728
    • 2005-02-04
    • J. Milton Harris
    • J. Milton Harris
    • A61K31/74A61K31/765
    • C08G65/33396A61K47/60C08G65/33317
    • PEG and related polymer derivatives having weak, hydrolytically unstable linkages near the reactive end of the polymer are provided for conjugation to drugs, including proteins, enzymes, small molecules, and others. These derivatives provide a sufficient circulation period for a drug-PEG conjugate, followed by hydrolytic breakdown of the conjugate and release of the bound molecule. In some cases, drugs that demonstrate reduced activity when permanently coupled to PEG maintain a therapeutically suitable activity when coupled to a degradable PEG in accordance with the invention. The PEG derivatives of the invention can be used to impart improved water solubility, increased size, a slower rate of kidney clearance, and reduced immunogenicity to a conjugate formed by attachment thereto. Controlled hydrolytic release of the bound molecule into an aqueous environment can then enhance the drug's delivery profile by providing a delivery system which employs such polymers and utilizes the teachings provided herein.
    • 提供在聚合物的反应性末端附近具有弱的水解不稳定键的PEG和相关的聚合物衍生物用于与药物(包括蛋白质,酶,小分子等)共轭。 这些衍生物为药物-PEG缀合物提供足够的循环周期,随后结合物的水解分解和结合分子的释放。 在一些情况下,当与PEG永久偶联时表现出降低的活性的药物在与根据本发明的可降解的PEG偶联时,保持治疗上合适的活性。 本发明的PEG衍生物可用于赋予改善的水溶性,增加的尺寸,较慢的肾清除速率,以及降低对通过其附着形成的缀合物的免疫原性。 然后通过提供使用这种聚合物并利用本文提供的教导的递送系统,将结合的分子控制的水解释放到水性环境中可以增强药物的递送分布。