申请人:Akzo Nobel N.V.
公开号:EP0495265A1
公开(公告)日:1992-07-22
This invention relates to the field of immune therapy of cancer, more specifically to immunoconjugates of a cytotoxic moiety with a targeting moiety, more specifically to immunoconjugates of antibodies or fragments or functional derivatives of antibodies coupled to a cytotoxic substance such as drugs, toxins or radioisotopes. It especially relates to the release of substances bound to a targeting moiety through the use of acid-cleavable linker molecules derived from compounds of formula I.
wherein:
R1 = H, lower alkyl, -N-lower alkyl, -O-lower alkyl, -S-lower alkyl, -N-lower aralkyl, -O-lower aralkyl, -S-lower aralkyl, -N-lower alkylene, -O-lower alkylene, -S-lower alkylene, -N-lower aryl, -O-lower aryl, -S-lower aryl, R2 = H, lower alkyl, lower aralkyl, lower aryl R₃ is
or another chemical structure which is able to decolize the lone pair electrons of the Nitrogen and R₄ is a pendant reactive group, capable of linking R₃ to a carrier molecule, a proteinaceous substance, an antibody (fragment), a polymer or a nucleic acid.
本发明涉及癌症的免疫治疗领域,更具体地说,涉及细胞毒性分子与靶向分子的免疫轭合物,更具体地说,涉及
抗体或
抗体片段或
抗体功能衍
生物与细胞毒性物质(如药物、毒素或放射性同位素)偶联的免疫轭合物。它特别涉及通过使用从式 I 化合物衍生的可酸解连接分子释放与靶向分子结合的物质。
其中
R1 = H、低级烷基、-N-低级烷基、-O-低级烷基、-S-低级烷基、-N-低级芳基、-O-低级芳基、-S-低级芳基、-N-低级亚烷基、-O-低级亚烷基、-S-低级亚烷基、-N-低级芳基、-O-低级芳基、-S-低级芳基, R2 = H、低级烷基、低级芳基、低级芳基 R₃ 是
或其他能使氮的孤对电子脱
锂的
化学结构,R₄ 是悬垂活性基团,能将 R₃ 与载体分子、蛋白质物质、
抗体(片段)、聚合物或核酸连接。