Inhibition of human dihydrofolate reductase by 2,4-diaminoquinazolines bearing simple substituents on the aromatic ring
作者:John B. Hynes、Alenka Tomažič、Arvind Kumar、Veena Kumar、James H. Freisheim
DOI:10.1002/jhet.5570280832
日期:1991.12
A series of thirty eight 2,4-diaminoquinazolines having diverse substitution patterns on the aromatic ring was evaluated for inhibitory activity against dihydrofolate reductase (DHFR) obtained from a human lymphoblast cell line. Many of these compounds were also evaluated as inhibitors of rat liver DHFR under the same experimental conditions. In most instances the results obtained with each enzyme
评价了一系列在芳香环上具有不同取代方式的38个2,4-二氨基喹唑啉对从人淋巴母细胞系获得的二氢叶酸还原酶(DHFR)的抑制活性。在相同的实验条件下,还评估了许多这些化合物作为大鼠肝脏DHFR的抑制剂。在大多数情况下,用每种酶获得的结果是可比的,表明就确定I 50值而言,啮齿动物酶是人DHFR的合适模型。结果表明,相对简单的5-取代的或5,6-二取代的2,4-二氨基喹唑啉可以是有效的DHFR抑制剂。在7或8位的非极性取代基的存在对抑制效能非常有害。