Cytotoxic agents bearing a polyethylene glycol (PEG) linking group having a terminal active ester, cytotoxic conjugates comprising one or more cytotoxic agents linked to a cell-binding agent via PEG linking groups, and methods for producing both are disclosed. A therapeutic composition comprising a therapeutically-effective amount of one of the cytotoxic conjugates of the present invention, and a method of killing selected cell populations comprising contacting target cells, or tissue containing target cells, with an effective amount of one of the cytotoxic conjugates, are also disclosed.
本文披露了带有具有末端活性酯的聚
乙二醇(P
EG)连接基团的细胞毒性药物、包括通过P
EG连接基团将一种或多种细胞毒性药物与细胞结合剂连接的细胞毒性结合物,以及生产这两种物质的方法。还披露了一种治疗组合物,包括本发明的一种细胞毒性结合物的治疗有效量,并且披露了一种杀灭选定细胞群的方法,包括将靶细胞或含有靶细胞的组织与一种细胞毒性结合物的有效量接触。