作者:Alessandra Crusco、Cinzia Bordoni、Anand Chakroborty、Kezia C.L. Whatley、Helen Whiteland、Andrew D. Westwell、Karl F. Hoffmann
DOI:10.1016/j.ejmech.2018.04.032
日期:2018.5
reported to display moderate activity against larval stages of Schistosoma mansoni (IC50 = 19.1 μM) and Fasciola hepatica (IC50 = 17.7 μM), two related parasitic blood and liver flukes responsible for the neglected tropical diseases schistosomiasis and fascioliasis, respectively. Here, we aimed to increase the potency of 7-keto-sempervirol by total synthesis of 30 structural analogues. Subsequent screening
最近有报道称,植物来源的二萜类7-酮-舒伯韦醇对曼氏血吸虫(IC50 = 19.1μM)和肝片状Fasciola hepatica(IC50 = 17.7μM)的幼虫期具有中等活性,这两种相关的寄生血和肝吸虫是造成这种疾病的主要原因。被忽视的热带病分别是血吸虫病和筋膜病。在这里,我们的目标是通过全合成30种结构类似物来提高7-keto-sempervirol的效力。随后针对这些寄生虫以及人类HepG2肝细胞系和牛MDBK肾细胞系的幼虫和成虫的生命周期阶段筛选了这些新的二萜类化合物,揭示了结构-活性关系趋势。最活跃的类似物7d表现出比7-酮基-间戊四醇更高的双重驱虫活性(幼虫吸血的IC50≈6μM;与HepG2和MDBK细胞相比,幼年肝吸虫的IC50≈3μM)和中等选择性(血吸虫的SI≈4-5,肝吸虫的8-13)。使用扫描电子显微镜进行的表型研究表明,两种蠕虫物种都有大量的表皮变化,从而支持