Schistosomicidal and trypanocidal structure–activity relationships for (±)-licarin A and its (−)- and (+)-enantiomers
作者:A.C. Pereira、L.G. Magalhães、U.O. Gonçalves、P.P. Luz、A.C.G. Moraes、V. Rodrigues、P.M. da Matta Guedes、A.A. da Silva Filho、W.R. Cunha、J.K. Bastos、N.P.D. Nanayakkara、M.L.A. e Silva
DOI:10.1016/j.phytochem.2011.04.007
日期:2011.8
(+/-)-Licarin A (1) was obtained by oxidative coupling, and its enantiomers, (-)-licarin A (2) and (+)-licarin A (3), were resolved by chiral HPLC. Schistosomicidal and trypanocidal activities of these compounds were evaluated in vitro against Schistosoma mansoni adult worms and trypomastigote forms of Trypanosoma cruzi. The racemic mixture (1) displayed significant schistosomicidal activity with an LC50 value of 53.57 mu M and moderate trypanocidal activity with an IC50 value of 127.17 mu M. On the other hand, the (-)-enantiomer (2), displaying a LC50 value of 91.71 mu M, was more active against S. mansoni than the (+)-enantiomer (3), which did not show activity. For the trypanocidal assay, enantiomer 2 showed more significant activity (IC50 of 23.46 mu M) than enantiomer 3, which showed an IC50 value of 87.73 mu M. Therefore, these results suggest that (+/-)-licarin A (1) and (-)-licarin A (2) are promising compounds that could be used for the development of schistosomicidal and trypanocidal agents. (C) 2011 Elsevier Ltd. All rights reserved.
(±)- Licensing A (1) 通过氧化偶联获得,其对映体 (-)-licarin A (2) 和 (+)-licarin A (3) 通过手性 HPLC 分离得到。这些化合物在体外对曼氏血吸虫成虫和克氏锥虫的锥鞭毛体形式进行了抗血吸虫和抗锥虫活性评估。外消旋混合物 (1) 显示出显著的抗血吸虫活性,LC50 值为 53.57 μM,并具有中等抗锥虫活性,IC50 值为 127.17 μM。另一方面,(-)-对映体 (2) 显示出 LC50 值为 91.71 μM,对 S. mansoni 的作用比 (+)-对映体 (3) 更有效,而 (3) 未显示活性。在抗锥虫实验中,对映体 2 显示出比对映体 3 更显著的活性,其 IC50 值分别为 23.46 μM 和 87.73 μM。因此,这些结果表明 (±)-licarin A (1) 和 (-)-licarin A (2) 是有前途的化合物,可用于开发抗血吸虫和抗锥虫剂。© 2011 Elsevier Ltd. 保留所有权利。