Inhibitors of human purine nucleoside phosphorylase. Synthesis and biological activities of 8-amino-3-benzylhypoxanthine and related analogs
作者:Peter W. K. Woo、Catherine R. Kostlan、Jagadish C. Sircar、Mi K. Dong、Richard B. Gilbertsen
DOI:10.1021/jm00086a014
日期:1992.4
A series of 3-substituted hypoxanthines (6-10, 14-17) and related analogues (22, 23) have been synthesized as inhibitors of purine nucleoside phosphorylase (PNP), which may conceivably act as T-cell-selective immunosuppressive agents with potential utility in autoimmune disorders such as rheumatoid arthritis, in organ transplantations, and in T-cell leukemias. The compounds were evaluated for their
已合成了一系列3-取代的次黄嘌呤(6-10,14-17)和相关类似物(22,23)作为嘌呤核苷磷酸化酶(PNP)的抑制剂,可以想象它们可作为T细胞选择性免疫抑制剂,与在自身免疫性疾病(例如类风湿性关节炎),器官移植和T细胞白血病中具有潜在用途。通过放射化学分析评估了化合物的PNP活性,以及它们对T淋巴母细胞系(MOLT-4)的细胞毒性作用。在3-苄基次黄嘌呤(7a)上进行适当的取代(PNP分析中的IC50,112 microM; MOLT-4分析中的IC50,204.2 microM)增加效力:8-氨基(17a; 42.6,65.2),2-羟基(9a; 13.4, 28.6),2-氨基(10a; 11.4,29.1)和2,8-二氨基(16a; 5.0,11.9)。迄今为止,如16b-d中16a的3-芳基取代基的变化未能进一步提高效力。如22a和23a所示,用类似的氮或硫官能团代替7a中