Identification and Mechanistic Evaluation of Hemozoin-Inhibiting Triarylimidazoles Active against Plasmodium falciparum

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• 作者：Kathryn J. Wicht ; Jill M. Combrinck ; Peter J. Smith ; Roger Hunter ; Timothy J. Egan
• 刊名：ACS Medicinal Chemistry Letters
• 出版年：2017
• 出版时间：February 9, 2017
• 年：2017
• 卷：8
• 期：2
• 页码：201-205
• 全文大小：369K
• ISSN：1948-5875

文摘

In a previous study, target based screening was carried out for inhibitors of β-hematin (synthetic hemozoin) formation, and a series of triarylimidazoles were identified as active against Plasmodium falciparum. Here, we report the subsequent synthesis and testing of derivatives with varying substituents on the three phenyl rings for this series. The results indicated that a 2-hydroxy-1,3-dimethoxy substitution pattern on ring A is required for submicromolar parasite activity. In addition, cell-fractionation studies revealed uncommonly large, dose-dependent increases of P. falciparum intracellular exchangeable (free) heme, correlating with decreased parasite survival for β-hematin inhibiting derivatives.