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    • 9. 发明申请
    • METHODS FOR MAKING CONJUGATES FROM DISULFIDE-CONTAINING PROTEINS
    • 从含有蛋白质的蛋白质制备结合物的方法
    • WO2015179734A1
    • 2015-11-26
    • PCT/US2015/032126
    • 2015-05-22
    • NOVARTIS AGHU, Qi-YingALLAN, Martin
    • HU, Qi-YingALLAN, Martin
    • A61K47/48
    • A61K38/05A61K47/68A61K47/6803A61K47/6849A61K47/6855
    • The invention provides methods to prepare protein conjugates from proteins having at least four accessible cysteine residues. In one embodiment, an antibody with four reducible disulfide linkages is reduced to provide four pairs of free cysteines. Each pair of free cysteines is reacted with a 1,3-dihaloacetone or similar reactant, linking the sulfur atoms of each pair together though a 3-carbon tether with a reactive ketone. A pair of these reactive ketones are linked together with and used to attach a single payload molecule, thus conjugating the antibody to two payload groups. This method gives a stabilized antibody conjugate with high selectivity for a ratio of two payloads per antibody.
    • 本发明提供了从具有至少四个可及半胱氨酸残基的蛋白质制备蛋白质缀合物的方法。 在一个实施方案中,减少具有四个可还原二硫键的抗体以提供四对游离半胱氨酸。 每对游离半胱氨酸与1,3-二卤代丙酮或类似的反应物反应,每一对硫原子通过3-碳链与反应性酮连接在一起。 一对这些反应性酮与一个有效载荷分子连接在一起并用于附着一个有效载荷分子,从而使抗体与两个有效负载组共轭。 该方法给出了每抗体两种有效载体比例具有高选择性的稳定的抗体缀合物。