The invention provides a therapeutic drug and targeting conjugate, pharmaceutical compositions containing these conjugates in pharmaceutical composition, and uses of these conjugates in anti-neoplastic and other therapeutic regimens. Also provided are novel intermediates thereof. The conjugates provide a therapeutic drug fragment or prodrug fragment bound to a targeting moiety via a linker which comprises a substrate cleavable by a protease such as Cathepsin B. The targeting moiety is a ligand which targets a cell surface molecule, such as a cell surface receptor on an anti-neoplastic cell. The ligand may function solely as a targeting moiety or may itself have a therapeutic effect. Following administration of the therapeutic drug and targeting conjugate of formula I and exposure of the conjugate to the protease specific for the substrate, the linker is cleaved and the targeting moiety is separated from the conjugate, which causes the drug fragment or prodrug fragment to convert to the drug or prodrug. The recited conjugates are useful in anti-neoplastic therapies. Also provided are methods of making the therapeutic drug and targeting conjugates and intermediates thereof, and kits comprising the therapeutic drug and targeting conjugates.
该发明提供了一种治疗药物和靶向共轭物，包含这些共轭物的药物组合物，以及这些共轭物在抗肿瘤和其他治疗方案中的用途。还提供了其新颖的中间体。这些共轭物通过一个由
蛋白酶如半胱
氨酸
蛋白酶B可切割的底物组成的连接物将治疗药物片段或前药片段与靶向基团结合。靶向基团是一个以细胞表面分子为靶点的
配体，例如抗肿瘤细胞上的细胞表面受体。该
配体可能仅作为靶向基团，也可能本身具有治疗效果。在给药公式I的治疗药物和靶向共轭物并使共轭物暴露于特异于底物的
蛋白酶的情况下，连接物被切割，靶向基团与共轭物分离，导致药物片段或前药片段转化为药物或前药。所述的共轭物在抗肿瘤疗法中很有用。还提供了制备治疗药物和靶向共轭物及其中间体的方法，以及包含治疗药物和靶向共轭物的试剂盒。
