ABSTRACT
On using the streptomycin-starved 18b strain as a model for nonreplicating
Mycobacterium tuberculosis
, we identified a 5-nitrothiophene compound as highly active but not cytotoxic. Mutants resistant to 5-nitrothiophenes were found be cross-resistant to the nitroimidazole PA-824 and unable to produce the F
420
cofactor. Furthermore, 5-nitrothiophenes were shown to be activated by the F
420
-dependent nitroreductase Ddn and to release nitric oxide, a mechanism of action identical to that described for nitroimidazoles.
摘要
关于使用链霉素饥饿的 18b 株作为非复制结核分枝杆菌的模型
结核分枝杆菌
我们发现一种 5-硝基噻吩化合物具有很高的活性,但没有细胞毒性。发现对 5-硝基噻吩类化合物具有抗性的突变体对硝基咪唑 PA-824 具有交叉抗性,并且不能产生 F
420
辅助因子。此外,5-硝基噻吩被 F
420
-依赖性硝基还原酶 Ddn 激活并释放一氧化氮,其作用机制与硝基咪唑的作用机制相同。