Synthetic Kavalactone Analogues with Increased Potency and Selective Anthelmintic Activity against Larvae of Haemonchus contortus In Vitro
作者:H.M.P. Dilrukshi Herath、Aya C. Taki、Nghi Nguyen、José Garcia-Bustos、Andreas Hofmann、Tao Wang、Guangxu Ma、Bill C.H. Chang、Abdul Jabbar、Brad E. Sleebs、Robin B. Gasser
DOI:10.3390/molecules25082004
日期:——
development of Haemonchus contortus in an in vitro-bioassay. In the present study, we synthesized two kavalactones, desmethoxyyangonin and yangonin, as well as 17 analogues thereof, and evaluated their anthelmintic activities using the same bioassay as employed previously. Structure activity relationship (SAR) studies showed that a 4-substituent on the pendant aryl ring was required for activity. In particular
卡瓦提取物是一种植物 Piper methysticum 的根茎水乳液,几个世纪以来一直被太平洋岛民用作礼仪饮料,几十年来一直作为抗焦虑剂出售。卡瓦内酯是卡瓦提取物的主要成分。在之前的一项调查中,我们已经在体外生物测定中鉴定了三种卡瓦内酯,它们可以抑制扭曲血矛线虫的幼虫发育。在本研究中,我们合成了两种卡瓦内酯,去甲氧基仰光素和仰光素,以及它们的 17 种类似物,并使用与以前使用的相同的生物测定法评估了它们的驱虫活性。构效关系 (SAR) 研究表明,活性需要侧芳环上的 4-取代基。特别地,具有 4-三氟甲氧基、4-二氟甲氧基、4-苯氧基、和 4-N-吗啉替代物的驱虫活性(IC50 值在 1.9 到 8.9 µM 的范围内)比母体天然产物去甲氧基仰光素(IC50 为 37.1 µM)和仰光素(IC50 为 15.0 µM)都大。合成的类似物在体外浓度高达 40 µM 时对 HepG2 人肝癌细