This invention provides novel substrate compounds that selectively inhibit the proliferation of pathological cells, for example, pathological calls that endogenously overexpress a target enzyme that confers resistance to biologic and chemotherapeutic agents. The enzyme acts on a substrate compound to 1) convert it to a cellular toxin and/or 2) release a toxic byproduct. In one embodiment, the activity of the target enzyme has been greatly enhanced in a target cell as a result of loss of tumor suppressor function and/or selection resulting from previous exposure to chemotherapy. In another embodiment, the pathological cell contains a target enzyme that is an expression product of an infectious agent in the cell. Further provided by this invention is a method for treating a subject by delivering to the subject a prodrug as described herein. The prodrugs of this invention may be used alone or in combination with other chemotherapeutics or alternative anti-cancer therapies such as radiation.
                            这项发明提供了新型底物化合物,可以选择性地抑制病理细胞的增殖,例如,内源性过度表达一种使
生物和化疗药物产生耐药性的靶酶的病理细胞。该酶作用于底物化合物,可以将其转化为细胞毒素和/或释放出有毒副产物。在一种实施例中,由于肿瘤抑制
基因功能丧失和/或之前暴露于化疗药物而导致的选择,目标细胞中的靶酶活性已被大大增强。在另一种实施例中,病理细胞含有一种是细胞内感染因子的表达产物的靶酶。此发明还提供了一种通过向受试者输送本文所述的前药来治疗受试者的方法。本发明的前药可以单独使用,也可以与其他化疗药物或放疗等替代抗癌疗法结合使用。