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    • 4. 发明授权
    • Antibody-enzyme conjugates in combination with prodrugs for the delivery
of cytotoxic agents to tumor cells
    • 抗体 - 酶缀合物与用于向肿瘤细胞递送细胞毒性剂的前药组合
    • US4975278A
    • 1990-12-04
    • US211301
    • 1988-06-29
    • Peter D. SenterMark G. SaulnierJoseph P. BrownDavid E. Kerr
    • Peter D. SenterMark G. SaulnierJoseph P. BrownDavid E. Kerr
    • A61K47/48
    • B82Y5/00A61K47/48761
    • This invention relates to a novel method for the delivery of cytotoxic drugs to tumor cells by the administration of a tumor-specific antibody-enzyme conjugate that binds to the tumor cells, and the additional administration of a prodrug that is converted at the tumor site, in the presence of the antibody-bound enzyme, to an active cytotoxic drug. According to preferred embodiments of this invention, antibody-enzyme conjugates containing the enzyme, alkaline phosphatase ("AP"), have been used in conjunction with the novel prodrug, etoposide-4'-phosphate or 7-(2'-aminoethyl phosphate)mitomycin or a combination thereof, to effect killing of tumor cells. According to another embodiment of the invention, an antibody-enzyme conjugate containing the enzyme, penicillin V amidase ("PVA"), has been used in conjunction with a novel prodrug, N-(p-hydroxyphenoxyacetyl)adriamycin to effect killing of tumor cells. Still another embodiment of the invention relates to the use of an antibody-enzyme conjugate containing the enzyme, cytosine deaminase ("CD"), in combination with the prodrug, 5-fluorocytosine, to effect killing of tumor cells. The method, antibody-enzyme conjugates, prodrugs, pharmaceutical compositions and combinations of this invention provide for enhanced selective killing of tumor cells and are thus useful in the treatment of cancers and other tumors.
    • 本发明涉及通过施用与肿瘤细胞结合的肿瘤特异性抗体 - 酶结合物向肿瘤细胞递送细胞毒性药物的新方法,以及额外施用在肿瘤部位转化的前体药物, 在抗体结合酶存在下,与活性细胞毒性药物接触。 根据本发明的优选实施方案,含有酶碱性磷酸酶(“AP”)的抗体 - 酶缀合物已经与新的前药,依托泊苷-4'-磷酸或7-(2'-氨基乙基磷酸酯)结合使用, 丝裂霉素或其组合,以杀死肿瘤细胞。 根据本发明的另一个实施方案,含有酶青霉素V酰胺酶(“PVA”)的抗体 - 酶结合物已经与新的前体药物N-(对羟基苯氧基乙酰基)阿霉素结合使用,以杀死肿瘤细胞 。 本发明的另一个实施方案涉及含有酶,胞嘧啶脱氨酶(“CD”)与前体药物5-氟胞嘧啶组合的抗体 - 酶偶联物用于杀死肿瘤细胞的用途。 本发明的方法,抗体 - 酶缀合物,前药,药物组合物和组合提供增强的肿瘤细胞的选择性杀伤,因此可用于治疗癌症和其它肿瘤。