Antimycobacterial Activities of 2,4-Diamino-5-Deazapteridine Derivatives and Effects on Mycobacterial Dihydrofolate Reductase
作者:William J. Suling、Lainne E. Seitz、Vibha Pathak、Louise Westbrook、Esther W. Barrow、Sabrina Zywno-van-Ginkel、Robert C. Reynolds、J. Robert Piper、William W. Barrow
DOI:10.1128/aac.44.10.2784-2793.2000
日期:2000.10
were active against MAC NJ168 at concentrations of < or =13 microg/ml. Depending on the MAC strain used, 81 to 87% had MICs of < or =1.3 microg/ml. Twenty-one derivatives were >100-fold more active against MAC rDHFR than against human rDHFR. In general, selectivity was dependent on the composition of the two-atom bridge at position 6 and the attached aryl group with substitutions at the 2' and 5' positions
开发用于鸟分枝杆菌复合体 (MAC) 感染的新抗分枝杆菌药物对于同时感染人类免疫缺陷病毒的人来说尤其重要。本研究的目的是评估 2, 4-diamino-5-methyl-5-deazapteridines (DMDPs) 对 MAC 的体外活性,并评估它们对 MAC 二氢叶酸还原酶重组酶 (rDHFR) 的活性。最初评估了 77 种 DMDP 衍生物对一到三株 MAC(NJ168、NJ211 和/或 NJ3404)的体外活性。用 10 倍稀释的药物和比色法(Alamar Blue)微量稀释肉汤测定法测定 MIC。还确定了 MAC rDHFR 50% 抑制浓度与人 rDHFR 的抑制浓度。蝶啶部分第 5 位的取代基包括 -CH(3)、-CH(2)CH(3) 和 -CH(2)OCH(3) 基团。此外,不同的取代和未取代的芳基通过 -CH(2)NH、-CH(2)N(CH(3))、-CH(2)CH(2)