Sulfonylureas Have Antifungal Activity and Are Potent Inhibitors of Candida albicans Acetohydroxyacid Synthase
作者:Yu-Ting Lee、Chang-Jun Cui、Eve W. L. Chow、Nason Pue、Thierry Lonhienne、Jian-Guo Wang、James A. Fraser、Luke W. Guddat
DOI:10.1021/jm301501k
日期:2013.1.10
albicans AHAS and shown that several sulfonylureas are inhibitors of this enzyme and possess antifungal activity. The most potent of these compounds is ethyl 2-(N-((4-iodo-6-methoxypyrimidin-2-yl)carbamoyl)sulfamoyl)benzoate (10c), which has a Ki value of 3.8 nM for C. albicans AHAS and an MIC90 of 0.7 μg/mL for this fungus in cell-based assays. For the sulfonylureas tested there was a strong correlation
磺酰脲类除草剂通过抑制植物乙酰羟酸合酶(AHAS)发挥其活性,该酶是支链氨基酸生物合成途径中的第一个酶。先前已经显示,如果在白色念珠菌中缺失了AHAS基因,则毒力减弱,这表明AHAS是抗真菌药物的靶标。本文中,我们已经克隆,表达和纯化白色念珠菌AHAS,并显示几种磺酰脲类是该酶的抑制剂,并具有抗真菌活性。这些化合物中最有效的是2-(N -((4-碘-6-甲氧基嘧啶-2-基)氨基甲酰基)氨磺酰基)苯甲酸酯乙酯(10c),其对白色念珠菌的K i值为3.8 nM 。在基于细胞的测定中,此真菌的AHAS和MIC 90为0.7μg/ mL。对于所测试的磺酰脲类,对白色念珠菌AHAS的抑制活性与杀真菌活性之间有很强的相关性,支持以下假设:AHAS是其在细胞内抑制活性的靶标。