Design, synthesis and biological evaluation of 5‑substituted sulfonylureas as novel antifungal agents targeting acetohydroxyacid synthase
作者:Fanfei Meng、Pengcheng Mi、Zhenwu Yu、Wei Wei、Li Gao、Jinzhou Ren、Zhengming Li、Huanqin Dai
DOI:10.1016/j.molstruc.2022.132756
日期:2022.7
mortality of fungal infections and the emergence of severe antifungal drug resistance. In this work, 36 target compounds were designed and synthesized and several 5-substituted sulfonylureas possess much better antifungal activities than those of Fluconazole (FCZ) and amphotericin B (AMB). The most potent of these were L10, L23 and L31 with inhibition constants (Ki) determined in the range of 5.6∼9.6 nM
乙酰羟酸合酶(AHAS;EC2.2.1.6)仅存在于植物和微生物中,当磺酰脲类与AHAS催化亚基活性位点结合时,支链氨基酸(缬氨酸、亮氨酸和异亮氨酸)的生物合成受阻,导致无法进行合成这些蛋白质并最终导致植物和微生物的死亡。因此,AHAS 也是一个很有前途的抗真菌靶点。如今,迫切需要发现新的潜在靶点和化学结构,以防止真菌感染的发病率和死亡率不断增加,以及出现严重的抗真菌药物耐药性。在这项工作中,设计和合成了 36 种目标化合物,其中几种 5-取代磺酰脲类药物具有比氟康唑 (FCZ) 和两性霉素 B (AMB) 更好的抗真菌活性。L10、L23和L31对白色念珠菌AHAS 和 MICs 的抑制常数 ( K i ) 在 5.6∼9.6 nM 范围内(MIC 被确定为相对于相应药物抑制真菌生长 > 90% 的药物浓度- 无生长控制)<0.05∼0.78 µg/mL白色念珠菌SC 5314、17#