申请人:Bayer Akiengesellschaft
公开号:US07304037B2
公开(公告)日:2007-12-04
The present invention relates to cytostatics which have a tumor-specific action as a result of linkage to αvβ3 integrin antagonists via preferred linking units which can be selectively cleaved by elastase, i.e. by an enzyme which can especially be found in tumor tissue. The preferred linking units provide sufficient stability of the conjugate of cytostatic and αvβ3 integrin antagonist in biological fluids 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.
本发明涉及一种细胞毒素,通过与αvβ3整合素拮抗剂的偏好连接单元连接,从而具有肿瘤特异性作用,这些连接单元可以被弹性蛋白酶选择性地裂解,即一种特别存在于肿瘤组织中的酶。所述的偏好连接单元在生物体液中提供足够的细胞毒素和αvβ3整合素拮抗剂的结合稳定性,并且同时通过其特异性的酶促或水解裂解释放细胞毒素,从而实现所需的肿瘤细胞内作用。