Alcohol-, Diol-, and Carbohydrate-Substituted Indenoisoquinolines as Topoisomerase I Inhibitors: Investigating the Relationships Involving Stereochemistry, Hydrogen Bonding, and Biological Activity

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• 作者：Katherine E. Peterson ; Maris A. Cinelli ; Andrew E. Morrell ; Akhil Mehta ; Thomas S. Dexheimer ; Keli Agama ; Smitha Antony ; Yves Pommier ; Mark Cushman
• 刊名：Journal of Medicinal Chemistry
• 出版年：2011
• 出版时间：July 28, 2011
• 年：2011
• 卷：54
• 期：14
• 页码：4937-4953
• 全文大小：1251K
• 年卷期：v.54,no.14(July 28, 2011)
• ISSN：1520-4804

文摘

The DNA-relaxing enzyme topoisomerase I (Top1) can be inhibited by heterocyclic compounds such as indolocarbazoles and indenoisoquinolines. Carbohydrate and hydroxyl-containing side chains are essential for the biological activity of indolocarbazoles. The current study investigated how similar functionalities could be 鈥渢ranslated鈥?to the indenoisoquinoline system and how stereochemistry and hydrogen bonding affect biological activity. Herein is described the preparation and assay of indenoisoquinolines substituted with short-chain alcohols, diols, and carbohydrates. Several compounds (including those derived from sugars) display potent Top1 poisoning and antiproliferative activities. The Top1 poisoning activity of diol-substituted indenoisoquinolines is dependent upon stereochemistry. Although the effect is striking, molecular modeling and docking studies do not indicate any reason for the difference in activity due to similar calculated interactions between the ligand and Top1鈥揇NA complex and ambiguity about the binding mode. A stereochemical dependence was also observed for carbohydrate-derived indenoisoquinolines. Although similar trends were observed in other classes of Top1 inhibitors, the exact nature of this effect has yet to be elucidated.