METHODS FOR MAKING CONJUGATES FROM DISULFIDE-CONTAINING PROTEINS

    公开(公告)号:US20170095572A1

    公开(公告)日:2017-04-06

    申请号:US15312267

    申请日:2015-05-22

    申请人: NOVARTIS AG

    IPC分类号: A61K39/00 A61K38/05

    摘要: 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.

    METHODS FOR MAKING CONJUGATES FROM DISULFIDE-CONTAINING PROTEINS

    公开(公告)号:US20190381126A1

    公开(公告)日:2019-12-19

    申请号:US16524951

    申请日:2019-07-29

    申请人: NOVARTIS AG

    IPC分类号: A61K38/05 A61K47/68

    摘要: 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.