The present invention relates to cytostatics which have a tumor-specific action as a result of linkage to &agr;
v
&bgr;
3
integrin antagonists via preferred linking units which can be selevtively cleaved by enzymes such as metallo matrixproteases (MMPs), i.e. by enzymes which can especially be found in tumor tissue. The preferred linking units guarantee the serum stability of the conjugate of cytostatic and &agr;
v
&bgr;
3
integrin antagonist and, at the same time, the desired intracellular action within tumor cells as a result of its specific enzymatic or hydrolytic cleavability with release of the cytostatic.
该发明涉及细胞毒药物,由于与αvβ3整合素拮抗剂通过首选连接单元的连接而具有肿瘤特异性作用,这些连接单元可以被
金属基质
蛋白酶(MMPs)等酶选择性地裂解,即可以在肿瘤组织中特别发现的酶。首选连接单元保证了细胞毒药物和αvβ3整合素拮抗剂的结合物的血清稳定性,并同时由于其特异性酶解或
水解可释放细胞毒药物而在肿瘤细胞内产生所需的细胞内作用。