Marine AChE inhibitors isolated from Geodia barretti: natural compounds and their synthetic analogs
作者:Elisabeth K. Olsen、Espen Hansen、Lindon W. K. Moodie、Johan Isaksson、Kristina Sepčić、Marija Cergolj、Johan Svenson、Jeanette H. Andersen
DOI:10.1039/c5ob02416a
日期:——
Based on the inhibitory activity, a library of 22 simplified synthetic analogs was designed and prepared to probe the role of the brominated indole, common to all the isolated compounds. From the structure–activity investigation it was shown that the brominated indole motif is not sufficient to generate a high acetylcholinesterase inhibitory activity, even when combined with natural cationic ligands
从收集自挪威沿海的海绵海绵Geodia barretti中分离出Barettin,8,9-dihydrobarettin,bromoconicamin和一种新型的溴化海洋吲哚。将该化合物评估为鳗鳗乙酰胆碱酯酶的抑制剂。Barettin和8,9-dihydrobarettin表现出对该酶的显着抑制作用,对乙酰胆碱酯酶的抑制常数(K i)分别为29和19μM 。可逆的非竞争机制。这些活性与海洋来源的几种其他天然乙酰胆碱酯酶抑制剂的活性相当。溴康那敏对乙酰胆碱酯酶的效力较弱,该新型化合物无活性。基于抑制活性,设计并制备了22种简化的合成类似物库,以探测所有分离的化合物共有的溴化吲哚的作用。从结构活性研究表明,即使与天然的阳离子配体结合用于乙酰胆碱酯酶活性位点,溴化的吲哚基团也不足以产生高的乙酰胆碱酯酶抑制活性。此外,还分析了这四种天然化合物的丁酰胆碱酯酶抑制活性,并显示出可比的活性。这项研究说明了巴瑞汀和8