Semisynthesis, Antiplasmodial Activity, and Mechanism of Action Studies of Isocoumarin Derivatives
作者:Lorena Coronado、Xue-Qing Zhang、Doriana Dorta、Nerea Escala、Laura M. Pineda、Michelle G. Ng、Esther del Olmo、Chang-Yun Wang、Yu-Cheng Gu、Chang-Lun Shao、Carmenza Spadafora
DOI:10.1021/acs.jnatprod.0c01032
日期:2021.5.28
potent antimalarial leads, a small library of 22 new derivatives (1a–1n, 2a, 3a–3c, 4a–4c, and 7a) were semisynthesized by varying the substituents of the aromatic ring and the aliphatic side chains. The natural compound (1) and three semisynthetic derivatives (1d, 1n, and 2a), possessing an all-cis stereochemistry, exhibited strong antiplasmodial activity with IC50 values of 1.1, 0.8, 0.4, and 2.6 μM, respectively
在这项研究中,八个天然异香豆素(1 - 8)得自海洋来源的分离玉米大藻。菌。探讨其构效关系,并发现有效的抗疟引线,22个新的衍生物的一小库(1A - 1N,图2a,图3a - 3C,4A - 4C,及图7A)通过改变所述芳香环和所述的取代基semisynthesized脂肪族侧链。天然化合物 ( 1 ) 和三种半合成衍生物 ( 1d , 1n , 和2a )),具有全顺式立体化学,表现出很强的抗疟原虫活性,IC 50值分别为 1.1、0.8、0.4 和 2.6 μM。机制研究表明,1n抑制血红素聚合并降低线粒体膜电位,但也抑制恶性疟原虫DNA 促旋酶。1n不仅结合了不同的作用机制,而且还表现出高治疗指数 (CC 50 /IC 50 = 675)、高选择性和显着的药物样特征。