Design and Synthesis of Dihydrofolate Reductase Inhibitors Encompassing a Bridging Ester Group. Evaluation in a Mouse Colitis Model
作者:Malin Graffner-Nordberg、Meredith Fyfe、Ralph Brattsand、Björn Mellgård、Anders Hallberg
DOI:10.1021/jm021062y
日期:2003.7.1
inflammatory bowel disease characterized by inflammation of both the small and large intestines. Methotrexate (MTX), a classical dihydrofolate reductase (DHFR) inhibitor, has been used as a therapeutic agent in the treatment of patients with Crohn's disease in recent years. We sought to develop antifolates similar in structure to MTX that would be effective in reducing inflammation in a mouse disease
克罗恩氏病是一种慢性炎症性肠病,其特征是小肠和大肠都发炎。甲氨蝶呤(MTX)是一种经典的二氢叶酸还原酶(DHFR)抑制剂,近年来已被用作克罗恩病患者的治疗剂。我们试图开发结构类似于MTX的抗叶酸药,该药可有效减轻结肠炎的小鼠疾病模型中的炎症。合成了在分子中心部分包含酯桥的四种经典DHFR抑制剂。这些抗叶酸剂是源自大鼠的DHFR酶的有效抑制剂。还体外测试了它们抑制小鼠脾淋巴细胞诱导的增殖的能力。仅在微摩尔范围内才能达到抑制细胞增殖的作用,而MTX在低纳摩尔浓度下有效。选择一种DHFR抑制剂(1),其rlDHFR的IC(50)值比甲氨蝶呤高约8倍,用于小鼠实验性结肠炎模型的体内实验。该化合物在局部给药后表现出明显的抗炎作用,与糖皮质激素布地奈德所达到的作用相当。在该模型中评估了三个参数:髓过氧化物酶活性,结肠重量和炎症评分。在所有三个炎症参数中均观察到化合物1的体内有益作用(15 mg /(kg