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    • 2. 发明授权
    • Site specific protein modification
    • 位点特异性蛋白质修饰
    • US06451986B1
    • 2002-09-17
    • US09102530
    • 1998-06-22
    • Dean K. Pettit
    • Dean K. Pettit
    • C07K100
    • C07K1/1077A61K47/60A61K47/62C07K14/7151
    • Processes for conjugating proteins with polyethylene glycol are disclosed. The disclosed processes provide modified proteins having little or no decrease in their activity and include the steps of deleting at least one amino acid residue on the protein, replacing the at least one amino acid residue with an amino acid residue that does not react with polyethylene glycol, and contacting the protein with polyethylene glycol under conditions sufficient to conjugate the polyethylene glycol to the protein. This advantageous retention of a desired protein activity is attributed to the availability of one or more protein binding sites which is unaltered in the conjugation process and thus remains free to interact with a binding partner ligand or cognate subsequent to the conjugation process.
    • 公开了将蛋白质与聚乙二醇缀合的方法。 所公开的方法提供了其活性几乎没有或没有降低的修饰的蛋白质,包括删除蛋白质上的至少一个氨基酸残基的步骤,用不与聚乙二醇反应的氨基酸残基取代至少一个氨基酸残基 并在足以将聚乙二醇与蛋白质缀合的条件下使蛋白与聚乙二醇接触。 所需蛋白质活性的这种有利的保留归因于在缀合过程中未改变的一个或多个蛋白质结合位点的可用性,因此在缀合过程之后保持与结合配偶体配体或同源物相互作用。
    • 6. 发明授权
    • Site protected protein modification
    • 现场保护蛋白质修饰
    • US06548644B1
    • 2003-04-15
    • US08814305
    • 1997-03-10
    • Dean K. Pettit
    • Dean K. Pettit
    • C07K1400
    • A61K47/642A61K47/60Y10S530/81
    • Processes for conjugating proteins with polyethylene glycol are disclosed. The disclosed processes provide modified proteins having little or no decrease in their activity and include the steps of protecting one or more sites on the protein, contacting the protected protein with polyethylene glycol under conditions suitable for conjugating the polyethylene glycol to the protein, and deprotecting the protein. This advantageous retention of a desired protein activity is attributed to the availability of one or more protein binding sites which is unaltered in the conjugation process and thus remains sterically free to interact with a binding partner ligand or cognate subsequent to the conjugation process.
    • 公开了将蛋白质与聚乙二醇缀合的方法。 所公开的方法提供其活性几乎没有或没有降低的修饰的蛋白质,并且包括保护蛋白质上的一个或多个位点的步骤,在适于将聚乙二醇与蛋白质缀合的条件下使受保护的蛋白质与聚乙二醇接触,并使 蛋白。 所需蛋白质活性的这种有利的保留归因于在缀合过程中未改变的一个或多个蛋白质结合位点的可用性,因此在缀合过程之后保持空间上与结合配偶体配体或同源物相互作用。
    • 7. 发明授权
    • Prolonged release of GM-CSF
    • 长时间释放GM-CSF
    • US06274175B1
    • 2001-08-14
    • US09442370
    • 1999-11-17
    • Wayne R. GombotzDean K. PettitSusan C. Pankey
    • Wayne R. GombotzDean K. PettitSusan C. Pankey
    • A61K916
    • A61K9/0019A61K9/0024A61K9/06A61K9/1635A61K9/1641A61K9/1647A61K38/193Y10T428/2989
    • Formulations for controlled, prolonged release of GM-CSF have been developed. These are based on solid microparticles formed of the combination of biodegradable, synthetic polymers such as poly(lactic acid) (PLA), poly(glycolic acid) (PGA), and copolymers thereof with excipients and drug loadings that yield zero order or first order release, or multiphasic release over a period of approximately three to twenty one days, preferably one week, when administered by injection. In the preferred embodiment, the microparticles are microspheres having diameters in the range of 10 to 60 microns, formed of a blend of PLGA having different molecular weights, most preferably 6,000, 30,000 and 41,000. Other embodiments have been developed to alter the release kinetics or the manner in which the drug is distributed in vivo. For example, in some cases a polymer is selected which elicits a mild inflammatory reaction, for example, PLGA and polyanhydrides can act as chemoattractant, either due to the polymer itself or minor contaminants in the polymer, or polymers which are bioadhesive are used for transmucosal or oral delivery. In another embodiment, the GM-CSF is administered in a hydrogel which can be injected subcutaneous or at a specific site for controlled release. The microparticles or hydrogel are administered to the patient in an amount effect to stimulate proliferation of hematopoietic cells, especially white cells.
    • 已经开发了控制,长期释放GM-CSF的制剂。 这些基于由生物可降解的合成聚合物如聚(乳酸)(PLA),聚(乙醇酸)(PGA))及其与赋形剂的共聚物和药物负载的组合形成的固体微粒,其产生零级或一级 当通过注射给药时,在约3至20天,优选1周的时间内释放或多相释放。 在优选的实施方案中,微粒是具有10至60微米范围内的直径的微球,由具有不同分子量,最优选6,000,300和41,000的PLGA的共混物形成。 已经开发了其它实施方案来改变药物在体内分布的释放动力学或方式。 例如,在一些情况下,选择引起轻度炎症反应的聚合物,例如PLGA和聚酐可以作为化学引诱剂,这是由于聚合物本身或聚合物中的微量污染物,或生物粘附剂的聚合物用于经粘膜 或口服。 在另一个实施方案中,GM-CSF以可以皮下注射或在特定部位注射用于控制释放的水凝胶施用。 将微粒或水凝胶以刺激造血细胞,特别是白细胞增殖的量施用于患者。